<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:5b3fa3a9-9658-4c69-8e1b-56fec9697a5d,g:65f3eff6-feb9-4602-a574-f42647ce9c13-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://lifx.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveLoss" xlink:type="simple" xlink:href="lifx-20220630.xsd#CondensedConsolidatedStatementsofOperationsandComprehensiveLoss"/>
  <link:definitionLink xlink:role="http://lifx.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveLoss" xlink:type="extended" id="i6cd9faefb7a64e3bbd662fa90ab57b73_CondensedConsolidatedStatementsofOperationsandComprehensiveLoss">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f5c8e81d-7990-4f81-832f-a308eae87d66" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f5c8e81d-7990-4f81-832f-a308eae87d66" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_82f7ef6a-0fc5-4226-83f6-16d8b83590a5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_82f7ef6a-0fc5-4226-83f6-16d8b83590a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_a3b98531-4ec2-465e-be06-1bf7130bff97" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_GrossProfit_a3b98531-4ec2-465e-be06-1bf7130bff97" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingCostsAndExpensesAbstract_b2202ecf-06b2-4114-89f9-d0185c7c1caa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingCostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_OperatingCostsAndExpensesAbstract_b2202ecf-06b2-4114-89f9-d0185c7c1caa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_c26eeaad-b874-437c-bb63-258012799154" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_b2202ecf-06b2-4114-89f9-d0185c7c1caa" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_c26eeaad-b874-437c-bb63-258012799154" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_5c9631a3-ba02-4fff-ab6a-608e826d521f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_b2202ecf-06b2-4114-89f9-d0185c7c1caa" xlink:to="loc_us-gaap_SellingAndMarketingExpense_5c9631a3-ba02-4fff-ab6a-608e826d521f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_b604b554-c96a-4c7d-abf0-0a61e1e6513f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_b2202ecf-06b2-4114-89f9-d0185c7c1caa" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_b604b554-c96a-4c7d-abf0-0a61e1e6513f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingCostsAndExpenses_9e797646-c4bd-4c41-a2f1-e0d7380ad699" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingCostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_b2202ecf-06b2-4114-89f9-d0185c7c1caa" xlink:to="loc_us-gaap_OperatingCostsAndExpenses_9e797646-c4bd-4c41-a2f1-e0d7380ad699" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_c08c2794-2f5b-4a60-9bbd-b5b7420e62f2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_OperatingIncomeLoss_c08c2794-2f5b-4a60-9bbd-b5b7420e62f2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f4e5b7cc-73e2-476a-9a1b-0eec0abd4a11" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NonoperatingIncomeExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f4e5b7cc-73e2-476a-9a1b-0eec0abd4a11" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_FairValueAdjustmentOfConvertibleNotes_6f3a011a-cc24-4267-862a-fdd5ff4ef9de" xlink:href="lifx-20220630.xsd#lifx_FairValueAdjustmentOfConvertibleNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f4e5b7cc-73e2-476a-9a1b-0eec0abd4a11" xlink:to="loc_lifx_FairValueAdjustmentOfConvertibleNotes_6f3a011a-cc24-4267-862a-fdd5ff4ef9de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_1c417425-a748-44b5-9bda-495258f499ed" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GainLossOnDerivativeInstrumentsNetPretax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f4e5b7cc-73e2-476a-9a1b-0eec0abd4a11" xlink:to="loc_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_1c417425-a748-44b5-9bda-495258f499ed" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_31ec25a2-9090-40b1-8a00-7015fe36f1ac" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f4e5b7cc-73e2-476a-9a1b-0eec0abd4a11" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_31ec25a2-9090-40b1-8a00-7015fe36f1ac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_cf2ce9ae-094c-45d3-b035-eb8ad8760d48" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f4e5b7cc-73e2-476a-9a1b-0eec0abd4a11" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_cf2ce9ae-094c-45d3-b035-eb8ad8760d48" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_ca434969-064e-44f1-8525-bf3a8d6fbb2b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_ca434969-064e-44f1-8525-bf3a8d6fbb2b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_581ae7b4-bc81-4bfd-a26a-dd9a25e0c57d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_581ae7b4-bc81-4bfd-a26a-dd9a25e0c57d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_5e716c42-ca58-435b-aab2-99443c3496fa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_NetIncomeLoss_5e716c42-ca58-435b-aab2-99443c3496fa" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_79e2dde1-55e2-4729-96e7-a1dbc3d8e5ec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_EarningsPerShareDiluted_79e2dde1-55e2-4729-96e7-a1dbc3d8e5ec" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_d9744592-2008-4c31-9f4a-1e9010041fec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_EarningsPerShareBasic_d9744592-2008-4c31-9f4a-1e9010041fec" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_76ef7044-3087-4926-9ec9-70cd939ac8ab" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_76ef7044-3087-4926-9ec9-70cd939ac8ab" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_7305aba5-d2c7-485a-8251-2575fa13010f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_7305aba5-d2c7-485a-8251-2575fa13010f" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_64157d21-ba53-4f8b-a76f-ed688feef145" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_64157d21-ba53-4f8b-a76f-ed688feef145" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_310d6927-823f-45d0-a9b7-87c7d48d627e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_e5c85b5c-3fb5-4226-a8eb-4be36ad3e909" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_64157d21-ba53-4f8b-a76f-ed688feef145" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_e5c85b5c-3fb5-4226-a8eb-4be36ad3e909" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_bf427a2d-2c2f-4a18-a5c5-710e2e528833" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_64157d21-ba53-4f8b-a76f-ed688feef145" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_bf427a2d-2c2f-4a18-a5c5-710e2e528833" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_18bb8527-1033-429a-a6e3-71f75088ec0e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_7af82ff3-5201-42a0-8d5d-ea3110f956a0" xlink:to="loc_us-gaap_StatementTable_18bb8527-1033-429a-a6e3-71f75088ec0e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_cac0b5e7-fcb4-4d19-a824-dfdb57bdaf01" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_18bb8527-1033-429a-a6e3-71f75088ec0e" xlink:to="loc_srt_ProductOrServiceAxis_cac0b5e7-fcb4-4d19-a824-dfdb57bdaf01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_cac0b5e7-fcb4-4d19-a824-dfdb57bdaf01_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_cac0b5e7-fcb4-4d19-a824-dfdb57bdaf01" xlink:to="loc_srt_ProductsAndServicesDomain_cac0b5e7-fcb4-4d19-a824-dfdb57bdaf01_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_8b6e486f-00af-491a-9ec4-a1b476e80dfb" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_cac0b5e7-fcb4-4d19-a824-dfdb57bdaf01" xlink:to="loc_srt_ProductsAndServicesDomain_8b6e486f-00af-491a-9ec4-a1b476e80dfb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubscriptionAndCirculationMember_10d02d99-c46a-45bb-afc5-16bcbcccc16b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubscriptionAndCirculationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_8b6e486f-00af-491a-9ec4-a1b476e80dfb" xlink:to="loc_us-gaap_SubscriptionAndCirculationMember_10d02d99-c46a-45bb-afc5-16bcbcccc16b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_HardwareMember_a9eaef6c-9f75-4f93-b615-8ec245290b8c" xlink:href="lifx-20220630.xsd#lifx_HardwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_8b6e486f-00af-491a-9ec4-a1b476e80dfb" xlink:to="loc_lifx_HardwareMember_a9eaef6c-9f75-4f93-b615-8ec245290b8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductAndServiceOtherMember_bec1fa37-55ae-4cb9-85c5-14ad00eb70a4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductAndServiceOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_8b6e486f-00af-491a-9ec4-a1b476e80dfb" xlink:to="loc_us-gaap_ProductAndServiceOtherMember_bec1fa37-55ae-4cb9-85c5-14ad00eb70a4" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/CondensedConsolidatedStatementsofStockholdersEquity" xlink:type="simple" xlink:href="lifx-20220630.xsd#CondensedConsolidatedStatementsofStockholdersEquity"/>
  <link:definitionLink xlink:role="http://lifx.com/role/CondensedConsolidatedStatementsofStockholdersEquity" xlink:type="extended" id="i2596f6a842784a0a88bedc483d0e82e3_CondensedConsolidatedStatementsofStockholdersEquity">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_408889ec-7e11-47cb-a237-540e0d101120" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_408889ec-7e11-47cb-a237-540e0d101120" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_4297a5c3-2b44-4ba8-bc5c-d051f069b3c3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_4297a5c3-2b44-4ba8-bc5c-d051f069b3c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_ccc9d9fa-7bc8-4443-a682-8287181bb995" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_StockholdersEquity_ccc9d9fa-7bc8-4443-a682-8287181bb995" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_1bf64b27-d987-440b-9e96-3084c136b6a1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_1bf64b27-d987-440b-9e96-3084c136b6a1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_52f47a08-fb49-48ef-bebd-9e85654a8d5d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_52f47a08-fb49-48ef-bebd-9e85654a8d5d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_58311140-bab0-40bc-81b9-67a65e04e51c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_58311140-bab0-40bc-81b9-67a65e04e51c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_3caecfa7-89a3-4506-98ba-e15361cde211" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_3caecfa7-89a3-4506-98ba-e15361cde211" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_12a2cba8-9f88-4c33-9f8c-2bb2c31aa8fd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_12a2cba8-9f88-4c33-9f8c-2bb2c31aa8fd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_37c15099-1285-4de4-9df8-90da684a51fe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_37c15099-1285-4de4-9df8-90da684a51fe" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_ba18d71d-77cc-4231-bcee-a00c445684d7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_ba18d71d-77cc-4231-bcee-a00c445684d7" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_06fccdb4-d8c0-4ff0-9886-3f5461adf965" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_06fccdb4-d8c0-4ff0-9886-3f5461adf965" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_6169695f-fa5d-4e5a-ba85-558eacda1ed7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_6169695f-fa5d-4e5a-ba85-558eacda1ed7" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_2ad195af-ce40-4d32-b222-ae8be485e99e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_2ad195af-ce40-4d32-b222-ae8be485e99e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_StockholdersEquityDecreaseForInterestAccruedNotesDueFromStockholders_eb9b5d71-0d34-4623-98ca-eb445bb1ae2e" xlink:href="lifx-20220630.xsd#lifx_StockholdersEquityDecreaseForInterestAccruedNotesDueFromStockholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_lifx_StockholdersEquityDecreaseForInterestAccruedNotesDueFromStockholders_eb9b5d71-0d34-4623-98ca-eb445bb1ae2e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_StockholdersEquityRepaymentOfNotesReceivableFromStockholders_22b2c564-b01f-4520-a90f-e236af95f587" xlink:href="lifx-20220630.xsd#lifx_StockholdersEquityRepaymentOfNotesReceivableFromStockholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_lifx_StockholdersEquityRepaymentOfNotesReceivableFromStockholders_22b2c564-b01f-4520-a90f-e236af95f587" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_StockIssuedDuringPeriodSharesSettlementOfContingentConsideration_1b0f8056-f33e-47a7-bd64-3cd87dd05e3d" xlink:href="lifx-20220630.xsd#lifx_StockIssuedDuringPeriodSharesSettlementOfContingentConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_lifx_StockIssuedDuringPeriodSharesSettlementOfContingentConsideration_1b0f8056-f33e-47a7-bd64-3cd87dd05e3d" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_StockIssuedDuringPeriodValueSettlementOfContingentConsideration_51553b19-47d8-4eee-b891-e9b439ff15f1" xlink:href="lifx-20220630.xsd#lifx_StockIssuedDuringPeriodValueSettlementOfContingentConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_lifx_StockIssuedDuringPeriodValueSettlementOfContingentConsideration_51553b19-47d8-4eee-b891-e9b439ff15f1" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_34db97a5-65ce-47f1-8d47-6a1a7e967fdc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_NetIncomeLoss_34db97a5-65ce-47f1-8d47-6a1a7e967fdc" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_16496cc2-f1de-4e24-8368-37a1351be2d3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b7cb6213-b175-4c5f-a069-91865ba65a42" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_16496cc2-f1de-4e24-8368-37a1351be2d3" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_a3a213cb-ddb2-449c-8c9c-68857531bc58" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_b7933a37-cf25-4457-8c51-eee0418095c7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_6420f2f7-891d-4756-b1a2-9a092948b43b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_408889ec-7e11-47cb-a237-540e0d101120" xlink:to="loc_us-gaap_StatementTable_6420f2f7-891d-4756-b1a2-9a092948b43b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_61069312-e9af-49b3-987f-084fe9e887b2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6420f2f7-891d-4756-b1a2-9a092948b43b" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_61069312-e9af-49b3-987f-084fe9e887b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_61069312-e9af-49b3-987f-084fe9e887b2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_61069312-e9af-49b3-987f-084fe9e887b2" xlink:to="loc_us-gaap_EquityComponentDomain_61069312-e9af-49b3-987f-084fe9e887b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_4a3ef87b-33a6-4890-8331-9bd11942a4a6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_61069312-e9af-49b3-987f-084fe9e887b2" xlink:to="loc_us-gaap_EquityComponentDomain_4a3ef87b-33a6-4890-8331-9bd11942a4a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_9c8fce7a-75b5-4d13-9275-09a35eebfaab" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4a3ef87b-33a6-4890-8331-9bd11942a4a6" xlink:to="loc_us-gaap_CommonStockMember_9c8fce7a-75b5-4d13-9275-09a35eebfaab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_254f1ffe-50b1-459b-9c87-9674690b6630" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4a3ef87b-33a6-4890-8331-9bd11942a4a6" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_254f1ffe-50b1-459b-9c87-9674690b6630" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesFromStockholderMember_bc72e1f2-4e41-43b6-b795-74301c3cb2a0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReceivablesFromStockholderMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4a3ef87b-33a6-4890-8331-9bd11942a4a6" xlink:to="loc_us-gaap_ReceivablesFromStockholderMember_bc72e1f2-4e41-43b6-b795-74301c3cb2a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_2535ea68-3cc5-4acf-960b-3b2b44d1b495" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4a3ef87b-33a6-4890-8331-9bd11942a4a6" xlink:to="loc_us-gaap_RetainedEarningsMember_2535ea68-3cc5-4acf-960b-3b2b44d1b495" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_f3a2d171-6fa5-473f-96e0-42cf77effe23" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4a3ef87b-33a6-4890-8331-9bd11942a4a6" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_f3a2d171-6fa5-473f-96e0-42cf77effe23" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:type="extended" id="i32aac0aae546455caa4bcc9f518c22b5_SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_fccc8f16-e13f-4c71-b191-9906b667b4a5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_fccc8f16-e13f-4c71-b191-9906b667b4a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ExtendedProductWarrantyTerm_a2c3755c-6705-4f59-ac8e-73d06eed8a6f" xlink:href="lifx-20220630.xsd#lifx_ExtendedProductWarrantyTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_lifx_ExtendedProductWarrantyTerm_a2c3755c-6705-4f59-ac8e-73d06eed8a6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_RevenuePartnershipAgreementTerm_41c95d51-814b-4e38-b292-b9f2cfd02b85" xlink:href="lifx-20220630.xsd#lifx_RevenuePartnershipAgreementTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_lifx_RevenuePartnershipAgreementTerm_41c95d51-814b-4e38-b292-b9f2cfd02b85" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_cdbf71c3-c653-4462-94bc-2ea1a2ad4fc7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_cdbf71c3-c653-4462-94bc-2ea1a2ad4fc7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_880d4bd1-e459-4978-a106-3500e4307853" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_880d4bd1-e459-4978-a106-3500e4307853" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstanding_70d178ff-bec8-473b-bfda-d6f6ed1e0aeb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WarrantsAndRightsOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_WarrantsAndRightsOutstanding_70d178ff-bec8-473b-bfda-d6f6ed1e0aeb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_e8229763-084d-4138-b389-9f7f9ad97743" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_e8229763-084d-4138-b389-9f7f9ad97743" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_cc2dd7d6-03e9-4c61-8994-0205f1cfea02" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_cc2dd7d6-03e9-4c61-8994-0205f1cfea02" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAmortizationPeriod_7f1abf76-2b83-45d5-b47f-2316dc6eb7cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalizedContractCostAmortizationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_CapitalizedContractCostAmortizationPeriod_7f1abf76-2b83-45d5-b47f-2316dc6eb7cb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_5c406c3e-9278-4888-8f1d-c5295b86b471" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:to="loc_srt_ProductOrServiceAxis_5c406c3e-9278-4888-8f1d-c5295b86b471" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5c406c3e-9278-4888-8f1d-c5295b86b471_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_5c406c3e-9278-4888-8f1d-c5295b86b471" xlink:to="loc_srt_ProductsAndServicesDomain_5c406c3e-9278-4888-8f1d-c5295b86b471_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e3e84328-a424-40b7-8e12-7aaf0f61d113" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_5c406c3e-9278-4888-8f1d-c5295b86b471" xlink:to="loc_srt_ProductsAndServicesDomain_e3e84328-a424-40b7-8e12-7aaf0f61d113" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubscriptionAndCirculationMember_2a14fadf-7ce4-4854-9e4a-c952d2e06074" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubscriptionAndCirculationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e3e84328-a424-40b7-8e12-7aaf0f61d113" xlink:to="loc_us-gaap_SubscriptionAndCirculationMember_2a14fadf-7ce4-4854-9e4a-c952d2e06074" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_HardwareMember_a8e8b5ee-4942-4d14-864f-7b9e55e23136" xlink:href="lifx-20220630.xsd#lifx_HardwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e3e84328-a424-40b7-8e12-7aaf0f61d113" xlink:to="loc_lifx_HardwareMember_a8e8b5ee-4942-4d14-864f-7b9e55e23136" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_DataMember_3ace4b10-db22-47b4-b36e-be329d62a650" xlink:href="lifx-20220630.xsd#lifx_DataMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e3e84328-a424-40b7-8e12-7aaf0f61d113" xlink:to="loc_lifx_DataMember_3ace4b10-db22-47b4-b36e-be329d62a650" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_PartnershipsMember_671f5c81-47d7-44eb-89f9-7da561947014" xlink:href="lifx-20220630.xsd#lifx_PartnershipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e3e84328-a424-40b7-8e12-7aaf0f61d113" xlink:to="loc_lifx_PartnershipsMember_671f5c81-47d7-44eb-89f9-7da561947014" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_1e9c54c3-6499-45fb-9782-445ea8f2354b" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:to="loc_srt_RangeAxis_1e9c54c3-6499-45fb-9782-445ea8f2354b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1e9c54c3-6499-45fb-9782-445ea8f2354b_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1e9c54c3-6499-45fb-9782-445ea8f2354b" xlink:to="loc_srt_RangeMember_1e9c54c3-6499-45fb-9782-445ea8f2354b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2d195736-aac3-4e23-a0a2-92739467d697" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1e9c54c3-6499-45fb-9782-445ea8f2354b" xlink:to="loc_srt_RangeMember_2d195736-aac3-4e23-a0a2-92739467d697" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_bcfa03ca-76d5-44f4-b9c5-5abb00b390a2" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2d195736-aac3-4e23-a0a2-92739467d697" xlink:to="loc_srt_MinimumMember_bcfa03ca-76d5-44f4-b9c5-5abb00b390a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_66e0a71a-e365-4bcc-a129-0b98d2ad87ad" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2d195736-aac3-4e23-a0a2-92739467d697" xlink:to="loc_srt_MaximumMember_66e0a71a-e365-4bcc-a129-0b98d2ad87ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_dd39fbb3-b0bd-40ea-871d-cf13a5c98aef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_dd39fbb3-b0bd-40ea-871d-cf13a5c98aef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_ec72f4eb-3937-436d-a2ce-98734202d259" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_ec72f4eb-3937-436d-a2ce-98734202d259" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_ec72f4eb-3937-436d-a2ce-98734202d259_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_ec72f4eb-3937-436d-a2ce-98734202d259" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_ec72f4eb-3937-436d-a2ce-98734202d259_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_b9f94b72-6ce8-4d37-bdcf-dfede5d2b671" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_ec72f4eb-3937-436d-a2ce-98734202d259" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_b9f94b72-6ce8-4d37-bdcf-dfede5d2b671" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_PreferredWarrantMember_e9d44a4b-83ff-43ff-8f55-760a0ca848bd" xlink:href="lifx-20220630.xsd#lifx_PreferredWarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_b9f94b72-6ce8-4d37-bdcf-dfede5d2b671" xlink:to="loc_lifx_PreferredWarrantMember_e9d44a4b-83ff-43ff-8f55-760a0ca848bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_2442f4eb-146c-4a6f-9ca9-ea6715e99174" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:to="loc_us-gaap_StatementClassOfStockAxis_2442f4eb-146c-4a6f-9ca9-ea6715e99174" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_2442f4eb-146c-4a6f-9ca9-ea6715e99174_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_2442f4eb-146c-4a6f-9ca9-ea6715e99174" xlink:to="loc_us-gaap_ClassOfStockDomain_2442f4eb-146c-4a6f-9ca9-ea6715e99174_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_3205910d-8d01-4905-919d-cffeae890a02" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_2442f4eb-146c-4a6f-9ca9-ea6715e99174" xlink:to="loc_us-gaap_ClassOfStockDomain_3205910d-8d01-4905-919d-cffeae890a02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesCPreferredStockMember_84a265f2-636d-45df-ac60-2413c4800756" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SeriesCPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_3205910d-8d01-4905-919d-cffeae890a02" xlink:to="loc_us-gaap_SeriesCPreferredStockMember_84a265f2-636d-45df-ac60-2413c4800756" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails_1" xlink:type="simple" xlink:href="lifx-20220630.xsd#SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails_1"/>
  <link:definitionLink xlink:role="http://lifx.com/role/SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails_1" xlink:type="extended" id="ie959168a9e744c198f0580d7e0bb6937_SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails_1">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_fccc8f16-e13f-4c71-b191-9906b667b4a5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_fccc8f16-e13f-4c71-b191-9906b667b4a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ExtendedProductWarrantyTerm_a2c3755c-6705-4f59-ac8e-73d06eed8a6f" xlink:href="lifx-20220630.xsd#lifx_ExtendedProductWarrantyTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_lifx_ExtendedProductWarrantyTerm_a2c3755c-6705-4f59-ac8e-73d06eed8a6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_RevenuePartnershipAgreementTerm_41c95d51-814b-4e38-b292-b9f2cfd02b85" xlink:href="lifx-20220630.xsd#lifx_RevenuePartnershipAgreementTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_lifx_RevenuePartnershipAgreementTerm_41c95d51-814b-4e38-b292-b9f2cfd02b85" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_cdbf71c3-c653-4462-94bc-2ea1a2ad4fc7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_cdbf71c3-c653-4462-94bc-2ea1a2ad4fc7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_880d4bd1-e459-4978-a106-3500e4307853" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_880d4bd1-e459-4978-a106-3500e4307853" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstanding_70d178ff-bec8-473b-bfda-d6f6ed1e0aeb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WarrantsAndRightsOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_WarrantsAndRightsOutstanding_70d178ff-bec8-473b-bfda-d6f6ed1e0aeb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_e8229763-084d-4138-b389-9f7f9ad97743" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_e8229763-084d-4138-b389-9f7f9ad97743" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_cc2dd7d6-03e9-4c61-8994-0205f1cfea02" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_cc2dd7d6-03e9-4c61-8994-0205f1cfea02" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAmortizationPeriod_7f1abf76-2b83-45d5-b47f-2316dc6eb7cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalizedContractCostAmortizationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_CapitalizedContractCostAmortizationPeriod_7f1abf76-2b83-45d5-b47f-2316dc6eb7cb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_66f16970-af40-405a-8eaa-844ab95b8c90" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_5c406c3e-9278-4888-8f1d-c5295b86b471" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:to="loc_srt_ProductOrServiceAxis_5c406c3e-9278-4888-8f1d-c5295b86b471" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5c406c3e-9278-4888-8f1d-c5295b86b471_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_5c406c3e-9278-4888-8f1d-c5295b86b471" xlink:to="loc_srt_ProductsAndServicesDomain_5c406c3e-9278-4888-8f1d-c5295b86b471_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e3e84328-a424-40b7-8e12-7aaf0f61d113" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_5c406c3e-9278-4888-8f1d-c5295b86b471" xlink:to="loc_srt_ProductsAndServicesDomain_e3e84328-a424-40b7-8e12-7aaf0f61d113" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubscriptionAndCirculationMember_2a14fadf-7ce4-4854-9e4a-c952d2e06074" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubscriptionAndCirculationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e3e84328-a424-40b7-8e12-7aaf0f61d113" xlink:to="loc_us-gaap_SubscriptionAndCirculationMember_2a14fadf-7ce4-4854-9e4a-c952d2e06074" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_HardwareMember_a8e8b5ee-4942-4d14-864f-7b9e55e23136" xlink:href="lifx-20220630.xsd#lifx_HardwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e3e84328-a424-40b7-8e12-7aaf0f61d113" xlink:to="loc_lifx_HardwareMember_a8e8b5ee-4942-4d14-864f-7b9e55e23136" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_DataMember_3ace4b10-db22-47b4-b36e-be329d62a650" xlink:href="lifx-20220630.xsd#lifx_DataMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e3e84328-a424-40b7-8e12-7aaf0f61d113" xlink:to="loc_lifx_DataMember_3ace4b10-db22-47b4-b36e-be329d62a650" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_PartnershipsMember_671f5c81-47d7-44eb-89f9-7da561947014" xlink:href="lifx-20220630.xsd#lifx_PartnershipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e3e84328-a424-40b7-8e12-7aaf0f61d113" xlink:to="loc_lifx_PartnershipsMember_671f5c81-47d7-44eb-89f9-7da561947014" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_1e9c54c3-6499-45fb-9782-445ea8f2354b" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:to="loc_srt_RangeAxis_1e9c54c3-6499-45fb-9782-445ea8f2354b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1e9c54c3-6499-45fb-9782-445ea8f2354b_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1e9c54c3-6499-45fb-9782-445ea8f2354b" xlink:to="loc_srt_RangeMember_1e9c54c3-6499-45fb-9782-445ea8f2354b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2d195736-aac3-4e23-a0a2-92739467d697" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1e9c54c3-6499-45fb-9782-445ea8f2354b" xlink:to="loc_srt_RangeMember_2d195736-aac3-4e23-a0a2-92739467d697" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_bcfa03ca-76d5-44f4-b9c5-5abb00b390a2" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2d195736-aac3-4e23-a0a2-92739467d697" xlink:to="loc_srt_MinimumMember_bcfa03ca-76d5-44f4-b9c5-5abb00b390a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_66e0a71a-e365-4bcc-a129-0b98d2ad87ad" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2d195736-aac3-4e23-a0a2-92739467d697" xlink:to="loc_srt_MaximumMember_66e0a71a-e365-4bcc-a129-0b98d2ad87ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_ec72f4eb-3937-436d-a2ce-98734202d259" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_ec72f4eb-3937-436d-a2ce-98734202d259" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_ec72f4eb-3937-436d-a2ce-98734202d259_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_ec72f4eb-3937-436d-a2ce-98734202d259" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_ec72f4eb-3937-436d-a2ce-98734202d259_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_b9f94b72-6ce8-4d37-bdcf-dfede5d2b671" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_ec72f4eb-3937-436d-a2ce-98734202d259" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_b9f94b72-6ce8-4d37-bdcf-dfede5d2b671" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_PreferredWarrantMember_e9d44a4b-83ff-43ff-8f55-760a0ca848bd" xlink:href="lifx-20220630.xsd#lifx_PreferredWarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_b9f94b72-6ce8-4d37-bdcf-dfede5d2b671" xlink:to="loc_lifx_PreferredWarrantMember_e9d44a4b-83ff-43ff-8f55-760a0ca848bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_2442f4eb-146c-4a6f-9ca9-ea6715e99174" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_f06eacd9-1a90-41c9-9835-7db29da705f5" xlink:to="loc_us-gaap_StatementClassOfStockAxis_2442f4eb-146c-4a6f-9ca9-ea6715e99174" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_2442f4eb-146c-4a6f-9ca9-ea6715e99174_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_2442f4eb-146c-4a6f-9ca9-ea6715e99174" xlink:to="loc_us-gaap_ClassOfStockDomain_2442f4eb-146c-4a6f-9ca9-ea6715e99174_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_3205910d-8d01-4905-919d-cffeae890a02" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_2442f4eb-146c-4a6f-9ca9-ea6715e99174" xlink:to="loc_us-gaap_ClassOfStockDomain_3205910d-8d01-4905-919d-cffeae890a02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesCPreferredStockMember_84a265f2-636d-45df-ac60-2413c4800756" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SeriesCPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_3205910d-8d01-4905-919d-cffeae890a02" xlink:to="loc_us-gaap_SeriesCPreferredStockMember_84a265f2-636d-45df-ac60-2413c4800756" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/SummaryofSignificantAccountingPoliciesChannelandRetailPartnersGreaterThan10Details" xlink:type="simple" xlink:href="lifx-20220630.xsd#SummaryofSignificantAccountingPoliciesChannelandRetailPartnersGreaterThan10Details"/>
  <link:definitionLink xlink:role="http://lifx.com/role/SummaryofSignificantAccountingPoliciesChannelandRetailPartnersGreaterThan10Details" xlink:type="extended" id="id3a53d47ea824037a9df5fb5a95b6846_SummaryofSignificantAccountingPoliciesChannelandRetailPartnersGreaterThan10Details">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_87712bc3-0099-49a9-9a03-be7415ca0a59" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_163f1dfe-a014-4a22-b9d0-f78984d4b963" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_87712bc3-0099-49a9-9a03-be7415ca0a59" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_163f1dfe-a014-4a22-b9d0-f78984d4b963" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_f545357c-8479-4ec8-92bf-313f46dd3c47" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_87712bc3-0099-49a9-9a03-be7415ca0a59" xlink:to="loc_us-gaap_ConcentrationRiskTable_f545357c-8479-4ec8-92bf-313f46dd3c47" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_22fde222-d8d5-4dbf-97e3-6609ecd72955" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_f545357c-8479-4ec8-92bf-313f46dd3c47" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_22fde222-d8d5-4dbf-97e3-6609ecd72955" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_22fde222-d8d5-4dbf-97e3-6609ecd72955_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_22fde222-d8d5-4dbf-97e3-6609ecd72955" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_22fde222-d8d5-4dbf-97e3-6609ecd72955_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_f070bb95-abfa-4e56-ad88-49877012fd60" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_22fde222-d8d5-4dbf-97e3-6609ecd72955" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_f070bb95-abfa-4e56-ad88-49877012fd60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_906374f3-3e22-4348-9844-ed2a34997221" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_f070bb95-abfa-4e56-ad88-49877012fd60" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_906374f3-3e22-4348-9844-ed2a34997221" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_6e263c0f-4e80-4bce-b0a8-12100f460dea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_f545357c-8479-4ec8-92bf-313f46dd3c47" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_6e263c0f-4e80-4bce-b0a8-12100f460dea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_6e263c0f-4e80-4bce-b0a8-12100f460dea_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_6e263c0f-4e80-4bce-b0a8-12100f460dea" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_6e263c0f-4e80-4bce-b0a8-12100f460dea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f869c242-5f77-4521-b215-a28ebedbd2ae" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_6e263c0f-4e80-4bce-b0a8-12100f460dea" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f869c242-5f77-4521-b215-a28ebedbd2ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_7ed0088d-134d-4485-b00e-a96d4d6906cd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f869c242-5f77-4521-b215-a28ebedbd2ae" xlink:to="loc_us-gaap_SalesRevenueNetMember_7ed0088d-134d-4485-b00e-a96d4d6906cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_10ab994c-4ca6-460e-aa1b-ed3c10fcb54f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f869c242-5f77-4521-b215-a28ebedbd2ae" xlink:to="loc_us-gaap_AccountsReceivableMember_10ab994c-4ca6-460e-aa1b-ed3c10fcb54f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_fb28c6c1-8c7f-4c78-b6b3-853e8eacbd32" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_f545357c-8479-4ec8-92bf-313f46dd3c47" xlink:to="loc_srt_MajorCustomersAxis_fb28c6c1-8c7f-4c78-b6b3-853e8eacbd32" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_fb28c6c1-8c7f-4c78-b6b3-853e8eacbd32_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_fb28c6c1-8c7f-4c78-b6b3-853e8eacbd32" xlink:to="loc_srt_NameOfMajorCustomerDomain_fb28c6c1-8c7f-4c78-b6b3-853e8eacbd32_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_d54651ea-2931-4740-93a9-440684998f8f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_fb28c6c1-8c7f-4c78-b6b3-853e8eacbd32" xlink:to="loc_srt_NameOfMajorCustomerDomain_d54651ea-2931-4740-93a9-440684998f8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ChannelPartnerAMember_016e09a9-17d5-4d8d-8806-dfaa7248abb1" xlink:href="lifx-20220630.xsd#lifx_ChannelPartnerAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_d54651ea-2931-4740-93a9-440684998f8f" xlink:to="loc_lifx_ChannelPartnerAMember_016e09a9-17d5-4d8d-8806-dfaa7248abb1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ChannelPartnerBMember_e4304183-170d-4698-b65b-314f7248577c" xlink:href="lifx-20220630.xsd#lifx_ChannelPartnerBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_d54651ea-2931-4740-93a9-440684998f8f" xlink:to="loc_lifx_ChannelPartnerBMember_e4304183-170d-4698-b65b-314f7248577c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_DataPartnerAMember_5b631cc1-1de6-4d53-93c7-7540c99b58e8" xlink:href="lifx-20220630.xsd#lifx_DataPartnerAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_d54651ea-2931-4740-93a9-440684998f8f" xlink:to="loc_lifx_DataPartnerAMember_5b631cc1-1de6-4d53-93c7-7540c99b58e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_RetailPartnerAMember_c7ec37fe-0f57-4d70-b213-a804b63d523d" xlink:href="lifx-20220630.xsd#lifx_RetailPartnerAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_d54651ea-2931-4740-93a9-440684998f8f" xlink:to="loc_lifx_RetailPartnerAMember_c7ec37fe-0f57-4d70-b213-a804b63d523d" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/SummaryofSignificantAccountingPoliciesRestrictedCashDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#SummaryofSignificantAccountingPoliciesRestrictedCashDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/SummaryofSignificantAccountingPoliciesRestrictedCashDetails" xlink:type="extended" id="i79e2150b149b49cbb955afdaf2b14a26_SummaryofSignificantAccountingPoliciesRestrictedCashDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_fd05fa21-7817-4af9-9fd2-49701159c231" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashNoncurrent_87d19cf5-37b3-45d9-b183-6dd72aa44947" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_fd05fa21-7817-4af9-9fd2-49701159c231" xlink:to="loc_us-gaap_RestrictedCashNoncurrent_87d19cf5-37b3-45d9-b183-6dd72aa44947" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationIndemnityEscrowTerm_43e8813b-cfd8-4c32-8de8-6983e80601d3" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationIndemnityEscrowTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_fd05fa21-7817-4af9-9fd2-49701159c231" xlink:to="loc_lifx_BusinessCombinationIndemnityEscrowTerm_43e8813b-cfd8-4c32-8de8-6983e80601d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_d7d3bb27-bff5-4bce-a97e-14d03026a173" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_fd05fa21-7817-4af9-9fd2-49701159c231" xlink:to="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_d7d3bb27-bff5-4bce-a97e-14d03026a173" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_461df974-bef9-46db-a613-d9e43643307e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_d7d3bb27-bff5-4bce-a97e-14d03026a173" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_461df974-bef9-46db-a613-d9e43643307e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_461df974-bef9-46db-a613-d9e43643307e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_461df974-bef9-46db-a613-d9e43643307e" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_461df974-bef9-46db-a613-d9e43643307e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_f8b8ea3c-6793-447b-a4ed-526efe2c6bc0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_461df974-bef9-46db-a613-d9e43643307e" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_f8b8ea3c-6793-447b-a4ed-526efe2c6bc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_IndemnityEscrowFundMember_f49a2a87-086d-4b0c-afcb-44facb3dce9a" xlink:href="lifx-20220630.xsd#lifx_IndemnityEscrowFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_f8b8ea3c-6793-447b-a4ed-526efe2c6bc0" xlink:to="loc_lifx_IndemnityEscrowFundMember_f49a2a87-086d-4b0c-afcb-44facb3dce9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_24e8b4f6-9fdc-4bd9-97db-94cbcec7527b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_f8b8ea3c-6793-447b-a4ed-526efe2c6bc0" xlink:to="loc_us-gaap_LetterOfCreditMember_24e8b4f6-9fdc-4bd9-97db-94cbcec7527b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_LeasesMember_82776f3c-e5bd-4e42-a190-14155a393422" xlink:href="lifx-20220630.xsd#lifx_LeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_f8b8ea3c-6793-447b-a4ed-526efe2c6bc0" xlink:to="loc_lifx_LeasesMember_82776f3c-e5bd-4e42-a190-14155a393422" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/SummaryofSignificantAccountingPoliciesPropertyandEquipmentnetDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#SummaryofSignificantAccountingPoliciesPropertyandEquipmentnetDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/SummaryofSignificantAccountingPoliciesPropertyandEquipmentnetDetails" xlink:type="extended" id="i3a00e063fadd44c3894985e8d738e518_SummaryofSignificantAccountingPoliciesPropertyandEquipmentnetDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_97d5c441-f753-4088-8f33-8a54b9be4b9f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_96f30187-dc67-4297-b681-02a01665411b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_97d5c441-f753-4088-8f33-8a54b9be4b9f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_96f30187-dc67-4297-b681-02a01665411b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_50cb5ff5-08fb-4b01-a15c-d5ab733c3f3a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_97d5c441-f753-4088-8f33-8a54b9be4b9f" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_50cb5ff5-08fb-4b01-a15c-d5ab733c3f3a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_4aebd1c3-544c-47a0-a7ba-a7ebff09bdfb" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_50cb5ff5-08fb-4b01-a15c-d5ab733c3f3a" xlink:to="loc_srt_RangeAxis_4aebd1c3-544c-47a0-a7ba-a7ebff09bdfb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_4aebd1c3-544c-47a0-a7ba-a7ebff09bdfb_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_4aebd1c3-544c-47a0-a7ba-a7ebff09bdfb" xlink:to="loc_srt_RangeMember_4aebd1c3-544c-47a0-a7ba-a7ebff09bdfb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_78e51778-f767-441c-a883-426961d3bb4e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_4aebd1c3-544c-47a0-a7ba-a7ebff09bdfb" xlink:to="loc_srt_RangeMember_78e51778-f767-441c-a883-426961d3bb4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_aa6dc098-7ff2-4bcc-845e-85e8dbb4cd12" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_78e51778-f767-441c-a883-426961d3bb4e" xlink:to="loc_srt_MinimumMember_aa6dc098-7ff2-4bcc-845e-85e8dbb4cd12" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_7d0e564c-17f3-4cd1-a2e6-b41333ea6b8b" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_78e51778-f767-441c-a883-426961d3bb4e" xlink:to="loc_srt_MaximumMember_7d0e564c-17f3-4cd1-a2e6-b41333ea6b8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_cba0c4d2-cd36-43ba-9f56-8f074e88aacd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_50cb5ff5-08fb-4b01-a15c-d5ab733c3f3a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_cba0c4d2-cd36-43ba-9f56-8f074e88aacd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_cba0c4d2-cd36-43ba-9f56-8f074e88aacd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_cba0c4d2-cd36-43ba-9f56-8f074e88aacd" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_cba0c4d2-cd36-43ba-9f56-8f074e88aacd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_6f5745b0-bfd6-4b08-947f-1f9b139db7ab" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_cba0c4d2-cd36-43ba-9f56-8f074e88aacd" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_6f5745b0-bfd6-4b08-947f-1f9b139db7ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_262b905d-b856-4f58-a0b7-35c3386f4b57" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_6f5745b0-bfd6-4b08-947f-1f9b139db7ab" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_262b905d-b856-4f58-a0b7-35c3386f4b57" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/SummaryofSignificantAccountingPoliciesSoftwareDevelopmentCostsDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#SummaryofSignificantAccountingPoliciesSoftwareDevelopmentCostsDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/SummaryofSignificantAccountingPoliciesSoftwareDevelopmentCostsDetails" xlink:type="extended" id="ie0eacee3dd994d338cd6b7f50061d250_SummaryofSignificantAccountingPoliciesSoftwareDevelopmentCostsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_c78474e6-99c0-491a-9ebb-60319dc44633" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_875b30f2-5a09-48d4-b0d3-e94a634b376a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_c78474e6-99c0-491a-9ebb-60319dc44633" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_875b30f2-5a09-48d4-b0d3-e94a634b376a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareAdditions_358081f7-0568-4d49-8e2e-f3690c074dca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalizedComputerSoftwareAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_c78474e6-99c0-491a-9ebb-60319dc44633" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareAdditions_358081f7-0568-4d49-8e2e-f3690c074dca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_3e7acb8f-487a-4a35-a432-cf92ef0bff13" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_c78474e6-99c0-491a-9ebb-60319dc44633" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_3e7acb8f-487a-4a35-a432-cf92ef0bff13" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2be16280-fdc4-460e-ba82-176c5faf9994" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_3e7acb8f-487a-4a35-a432-cf92ef0bff13" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2be16280-fdc4-460e-ba82-176c5faf9994" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2be16280-fdc4-460e-ba82-176c5faf9994_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2be16280-fdc4-460e-ba82-176c5faf9994" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2be16280-fdc4-460e-ba82-176c5faf9994_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_6e62c456-0641-443e-b74d-6adfc679c3dd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2be16280-fdc4-460e-ba82-176c5faf9994" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_6e62c456-0641-443e-b74d-6adfc679c3dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_4a038e6c-fcfd-40c5-838a-a38215ed500b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_6e62c456-0641-443e-b74d-6adfc679c3dd" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_4a038e6c-fcfd-40c5-838a-a38215ed500b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/SummaryofSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#SummaryofSignificantAccountingPoliciesStockBasedCompensationDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/SummaryofSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:type="extended" id="i5388adcf1cf04528bd78cbed90d81ddc_SummaryofSignificantAccountingPoliciesStockBasedCompensationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a52b44a6-0a8c-45f9-9c03-a1394c1cdc15" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_34762336-5ea5-4091-b411-4cd9b995a195" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a52b44a6-0a8c-45f9-9c03-a1394c1cdc15" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_34762336-5ea5-4091-b411-4cd9b995a195" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_ae5c1c0e-e49a-4814-9316-3804addf1de1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a52b44a6-0a8c-45f9-9c03-a1394c1cdc15" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_ae5c1c0e-e49a-4814-9316-3804addf1de1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_a120fbb4-a56b-4caa-bf5b-06d3d625dbab" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a52b44a6-0a8c-45f9-9c03-a1394c1cdc15" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_a120fbb4-a56b-4caa-bf5b-06d3d625dbab" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_9ca87bdb-5046-4cc3-a22c-17271caa1a17" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_a120fbb4-a56b-4caa-bf5b-06d3d625dbab" xlink:to="loc_srt_RangeAxis_9ca87bdb-5046-4cc3-a22c-17271caa1a17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_9ca87bdb-5046-4cc3-a22c-17271caa1a17_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_9ca87bdb-5046-4cc3-a22c-17271caa1a17" xlink:to="loc_srt_RangeMember_9ca87bdb-5046-4cc3-a22c-17271caa1a17_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_8f126f30-637e-4677-a8fe-5fb96f706473" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_9ca87bdb-5046-4cc3-a22c-17271caa1a17" xlink:to="loc_srt_RangeMember_8f126f30-637e-4677-a8fe-5fb96f706473" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_14adf6f3-a303-483f-8eb3-9169bb5e314b" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_8f126f30-637e-4677-a8fe-5fb96f706473" xlink:to="loc_srt_MinimumMember_14adf6f3-a303-483f-8eb3-9169bb5e314b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_6283c3d7-62ed-4605-814d-2b83e2aa28cb" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_8f126f30-637e-4677-a8fe-5fb96f706473" xlink:to="loc_srt_MaximumMember_6283c3d7-62ed-4605-814d-2b83e2aa28cb" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/RevenueDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#RevenueDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/RevenueDetails" xlink:type="extended" id="i058f10338b5c46dc8b0c2184d2e367c5_RevenueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_4c28ca57-f260-43d0-a021-188a0219d42c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d5611c5b-bed5-4a37-9628-7243c5d897ac" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4c28ca57-f260-43d0-a021-188a0219d42c" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d5611c5b-bed5-4a37-9628-7243c5d897ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_b403beac-8bf7-4ec1-8d48-c7b816166a8b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_4c28ca57-f260-43d0-a021-188a0219d42c" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_b403beac-8bf7-4ec1-8d48-c7b816166a8b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_e992acb0-84ee-4c47-98aa-d6ad3eb38abd" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_b403beac-8bf7-4ec1-8d48-c7b816166a8b" xlink:to="loc_srt_StatementGeographicalAxis_e992acb0-84ee-4c47-98aa-d6ad3eb38abd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_e992acb0-84ee-4c47-98aa-d6ad3eb38abd_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_e992acb0-84ee-4c47-98aa-d6ad3eb38abd" xlink:to="loc_srt_SegmentGeographicalDomain_e992acb0-84ee-4c47-98aa-d6ad3eb38abd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_ea97738d-48ba-41c0-907b-e9301a5fcde3" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_e992acb0-84ee-4c47-98aa-d6ad3eb38abd" xlink:to="loc_srt_SegmentGeographicalDomain_ea97738d-48ba-41c0-907b-e9301a5fcde3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NorthAmericaMember_c7cc6da1-9400-456c-a505-7fd72051641b" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_NorthAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ea97738d-48ba-41c0-907b-e9301a5fcde3" xlink:to="loc_srt_NorthAmericaMember_c7cc6da1-9400-456c-a505-7fd72051641b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EMEAMember_9c268fa3-f6ff-414a-8d5b-79045a3defbc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EMEAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ea97738d-48ba-41c0-907b-e9301a5fcde3" xlink:to="loc_us-gaap_EMEAMember_9c268fa3-f6ff-414a-8d5b-79045a3defbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_OtherInternationalRegionsMember_1b77a72d-f0da-458c-b47e-0fa083a1692f" xlink:href="lifx-20220630.xsd#lifx_OtherInternationalRegionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ea97738d-48ba-41c0-907b-e9301a5fcde3" xlink:to="loc_lifx_OtherInternationalRegionsMember_1b77a72d-f0da-458c-b47e-0fa083a1692f" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/DeferredRevenueDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#DeferredRevenueDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/DeferredRevenueDetails" xlink:type="extended" id="ic8b8d0b0a4e64000b3d720c81387d855_DeferredRevenueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContractWithCustomerLiabilityLineItems_922f784f-781d-4335-abc8-f20841f84886" xlink:href="lifx-20220630.xsd#lifx_ContractWithCustomerLiabilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContractWithCustomerLiabilityRollForward_fecf2846-73ff-444b-ab87-ece50d407898" xlink:href="lifx-20220630.xsd#lifx_ContractWithCustomerLiabilityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lifx_ContractWithCustomerLiabilityLineItems_922f784f-781d-4335-abc8-f20841f84886" xlink:to="loc_lifx_ContractWithCustomerLiabilityRollForward_fecf2846-73ff-444b-ab87-ece50d407898" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_3e628948-fc5c-4509-9750-01c589978424" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lifx_ContractWithCustomerLiabilityRollForward_fecf2846-73ff-444b-ab87-ece50d407898" xlink:to="loc_us-gaap_ContractWithCustomerLiability_3e628948-fc5c-4509-9750-01c589978424" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination_caa8f2a0-942d-4c30-8ab9-d56b06dee219" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lifx_ContractWithCustomerLiabilityRollForward_fecf2846-73ff-444b-ab87-ece50d407898" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination_caa8f2a0-942d-4c30-8ab9-d56b06dee219" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContractWithCustomerLiabilityAdditions_4757d056-1e47-43d4-b716-6f9ef29d58db" xlink:href="lifx-20220630.xsd#lifx_ContractWithCustomerLiabilityAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lifx_ContractWithCustomerLiabilityRollForward_fecf2846-73ff-444b-ab87-ece50d407898" xlink:to="loc_lifx_ContractWithCustomerLiabilityAdditions_4757d056-1e47-43d4-b716-6f9ef29d58db" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance_62c22462-3272-4ea4-97cc-b82459986245" xlink:href="lifx-20220630.xsd#lifx_ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lifx_ContractWithCustomerLiabilityRollForward_fecf2846-73ff-444b-ab87-ece50d407898" xlink:to="loc_lifx_ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance_62c22462-3272-4ea4-97cc-b82459986245" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_ea046933-c258-4205-8b03-5c58e8210019" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContractWithCustomerLiabilityTable_f9c27cc4-27f1-4e79-8d90-f47a7744d325" xlink:href="lifx-20220630.xsd#lifx_ContractWithCustomerLiabilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_lifx_ContractWithCustomerLiabilityLineItems_922f784f-781d-4335-abc8-f20841f84886" xlink:to="loc_lifx_ContractWithCustomerLiabilityTable_f9c27cc4-27f1-4e79-8d90-f47a7744d325" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_0ad4e5e9-5951-4f6e-a103-ff6fd14a9f02" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_lifx_ContractWithCustomerLiabilityTable_f9c27cc4-27f1-4e79-8d90-f47a7744d325" xlink:to="loc_srt_ProductOrServiceAxis_0ad4e5e9-5951-4f6e-a103-ff6fd14a9f02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_0ad4e5e9-5951-4f6e-a103-ff6fd14a9f02_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_0ad4e5e9-5951-4f6e-a103-ff6fd14a9f02" xlink:to="loc_srt_ProductsAndServicesDomain_0ad4e5e9-5951-4f6e-a103-ff6fd14a9f02_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_fafdc920-d6a7-4858-90d3-f5fc618ad693" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_0ad4e5e9-5951-4f6e-a103-ff6fd14a9f02" xlink:to="loc_srt_ProductsAndServicesDomain_fafdc920-d6a7-4858-90d3-f5fc618ad693" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubscriptionAndCirculationMember_305ca7c0-af29-44d5-b7a7-e352b79e3c7b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubscriptionAndCirculationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_fafdc920-d6a7-4858-90d3-f5fc618ad693" xlink:to="loc_us-gaap_SubscriptionAndCirculationMember_305ca7c0-af29-44d5-b7a7-e352b79e3c7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_HardwareMember_31377640-815d-4e87-b203-e049c40afc23" xlink:href="lifx-20220630.xsd#lifx_HardwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_fafdc920-d6a7-4858-90d3-f5fc618ad693" xlink:to="loc_lifx_HardwareMember_31377640-815d-4e87-b203-e049c40afc23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductAndServiceOtherMember_671f338e-9373-4a41-ae67-b3889898a068" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductAndServiceOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_fafdc920-d6a7-4858-90d3-f5fc618ad693" xlink:to="loc_us-gaap_ProductAndServiceOtherMember_671f338e-9373-4a41-ae67-b3889898a068" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/CostsCapitalizedtoObtainContractsDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#CostsCapitalizedtoObtainContractsDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/CostsCapitalizedtoObtainContractsDetails" xlink:type="extended" id="iea6a7bd79bc04a849a49f8176a022609_CostsCapitalizedtoObtainContractsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostLineItems_a66430be-5a85-45fa-956e-ae80f86381fa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalizedContractCostLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAmortizationPeriod_8b1a7910-f6ca-4bbb-92d7-e0dd434df6f1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalizedContractCostAmortizationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedContractCostLineItems_a66430be-5a85-45fa-956e-ae80f86381fa" xlink:to="loc_us-gaap_CapitalizedContractCostAmortizationPeriod_8b1a7910-f6ca-4bbb-92d7-e0dd434df6f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_CapitalizedContractCostRollForward_b2a643ea-f6d1-443c-810a-873ae52007d2" xlink:href="lifx-20220630.xsd#lifx_CapitalizedContractCostRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedContractCostLineItems_a66430be-5a85-45fa-956e-ae80f86381fa" xlink:to="loc_lifx_CapitalizedContractCostRollForward_b2a643ea-f6d1-443c-810a-873ae52007d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNet_8608f4a8-416c-4d63-8b04-1842942adb00" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalizedContractCostNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lifx_CapitalizedContractCostRollForward_b2a643ea-f6d1-443c-810a-873ae52007d2" xlink:to="loc_us-gaap_CapitalizedContractCostNet_8608f4a8-416c-4d63-8b04-1842942adb00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_CapitalizedContractCostIncreaseForContractAcquiredInBusinessCombination_f93d4f46-d2fe-4a7b-9ae0-4a4206bf31b5" xlink:href="lifx-20220630.xsd#lifx_CapitalizedContractCostIncreaseForContractAcquiredInBusinessCombination"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lifx_CapitalizedContractCostRollForward_b2a643ea-f6d1-443c-810a-873ae52007d2" xlink:to="loc_lifx_CapitalizedContractCostIncreaseForContractAcquiredInBusinessCombination_f93d4f46-d2fe-4a7b-9ae0-4a4206bf31b5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_CapitalizedContractCostAdditions_106f5996-48ca-4463-9db6-6a0d822a2cb0" xlink:href="lifx-20220630.xsd#lifx_CapitalizedContractCostAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lifx_CapitalizedContractCostRollForward_b2a643ea-f6d1-443c-810a-873ae52007d2" xlink:to="loc_lifx_CapitalizedContractCostAdditions_106f5996-48ca-4463-9db6-6a0d822a2cb0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAmortization_257d5842-fa25-4859-b1c3-e6d612697218" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalizedContractCostAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lifx_CapitalizedContractCostRollForward_b2a643ea-f6d1-443c-810a-873ae52007d2" xlink:to="loc_us-gaap_CapitalizedContractCostAmortization_257d5842-fa25-4859-b1c3-e6d612697218" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNet_a2053aac-5881-46d8-9f96-002b4aa80cab" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalizedContractCostNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNetCurrent_9db2b102-d789-415d-87ac-352ecf211760" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalizedContractCostNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedContractCostLineItems_a66430be-5a85-45fa-956e-ae80f86381fa" xlink:to="loc_us-gaap_CapitalizedContractCostNetCurrent_9db2b102-d789-415d-87ac-352ecf211760" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNetNoncurrent_6505cfd3-b476-4983-b18e-b506661a72d0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalizedContractCostNetNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizedContractCostLineItems_a66430be-5a85-45fa-956e-ae80f86381fa" xlink:to="loc_us-gaap_CapitalizedContractCostNetNoncurrent_6505cfd3-b476-4983-b18e-b506661a72d0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNet_d3680ae7-d24d-4b6c-81a9-6b76021630d0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalizedContractCostNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostTable_72812205-e9b5-431d-a007-4281a1bba33f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalizedContractCostTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CapitalizedContractCostLineItems_a66430be-5a85-45fa-956e-ae80f86381fa" xlink:to="loc_us-gaap_CapitalizedContractCostTable_72812205-e9b5-431d-a007-4281a1bba33f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_04596cde-b383-43f0-bbaf-87196ab815a7" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_CapitalizedContractCostTable_72812205-e9b5-431d-a007-4281a1bba33f" xlink:to="loc_srt_RangeAxis_04596cde-b383-43f0-bbaf-87196ab815a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_04596cde-b383-43f0-bbaf-87196ab815a7_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_04596cde-b383-43f0-bbaf-87196ab815a7" xlink:to="loc_srt_RangeMember_04596cde-b383-43f0-bbaf-87196ab815a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_8307809c-3cfd-41de-bc2f-cc4143d8971e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_04596cde-b383-43f0-bbaf-87196ab815a7" xlink:to="loc_srt_RangeMember_8307809c-3cfd-41de-bc2f-cc4143d8971e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_97bacde9-9e74-43f4-8921-15f356695f57" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_8307809c-3cfd-41de-bc2f-cc4143d8971e" xlink:to="loc_srt_MinimumMember_97bacde9-9e74-43f4-8921-15f356695f57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_3e13c5f6-9d0f-4bcc-b6dd-9f47c98ef683" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_8307809c-3cfd-41de-bc2f-cc4143d8971e" xlink:to="loc_srt_MaximumMember_3e13c5f6-9d0f-4bcc-b6dd-9f47c98ef683" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/FairValueMeasurementsFairValueandClassificationofInstrumentsDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#FairValueMeasurementsFairValueandClassificationofInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/FairValueMeasurementsFairValueandClassificationofInstrumentsDetails" xlink:type="extended" id="i7f33d8a2e6bd48ab8d79f9eb9a031bad_FairValueMeasurementsFairValueandClassificationofInstrumentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_0bc3e6d3-3701-4bca-81db-735cba15cbce" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_b5c5249e-4d1a-4724-bd24-c41f6da3f1b5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_0bc3e6d3-3701-4bca-81db-735cba15cbce" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_b5c5249e-4d1a-4724-bd24-c41f6da3f1b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_0ede5b69-ac0a-42bf-9d30-2afe24322d71" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_b5c5249e-4d1a-4724-bd24-c41f6da3f1b5" xlink:to="loc_us-gaap_DerivativeLiabilities_0ede5b69-ac0a-42bf-9d30-2afe24322d71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtFairValueDisclosures_cba02351-fd44-4478-aa7e-bee03e709d32" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtFairValueDisclosures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_b5c5249e-4d1a-4724-bd24-c41f6da3f1b5" xlink:to="loc_us-gaap_ConvertibleDebtFairValueDisclosures_cba02351-fd44-4478-aa7e-bee03e709d32" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_86e5d588-f733-4e5c-a46b-6557b8cbb547" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_b5c5249e-4d1a-4724-bd24-c41f6da3f1b5" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_86e5d588-f733-4e5c-a46b-6557b8cbb547" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_923ab530-9b33-4098-8e46-bb0285ee045c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_b5c5249e-4d1a-4724-bd24-c41f6da3f1b5" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_923ab530-9b33-4098-8e46-bb0285ee045c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_4dc4f38b-0241-4833-a7e0-a59e7a941fd1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_0bc3e6d3-3701-4bca-81db-735cba15cbce" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_4dc4f38b-0241-4833-a7e0-a59e7a941fd1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_cc821ae9-e014-4458-afa9-cee433fb9b2e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_4dc4f38b-0241-4833-a7e0-a59e7a941fd1" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_cc821ae9-e014-4458-afa9-cee433fb9b2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_cc821ae9-e014-4458-afa9-cee433fb9b2e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_cc821ae9-e014-4458-afa9-cee433fb9b2e" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_cc821ae9-e014-4458-afa9-cee433fb9b2e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_642e697f-615c-4828-866f-f5b550de19d7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_cc821ae9-e014-4458-afa9-cee433fb9b2e" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_642e697f-615c-4828-866f-f5b550de19d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_14588161-c54b-453e-b675-9c1848fcdccd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_642e697f-615c-4828-866f-f5b550de19d7" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_14588161-c54b-453e-b675-9c1848fcdccd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_52eab8b4-374e-4b88-a1e1-3c08876b191e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_642e697f-615c-4828-866f-f5b550de19d7" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_52eab8b4-374e-4b88-a1e1-3c08876b191e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_268e3005-6a43-445c-bc4f-24590f61cf36" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_642e697f-615c-4828-866f-f5b550de19d7" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_268e3005-6a43-445c-bc4f-24590f61cf36" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/FairValueMeasurementsChangeinFairValueofConvertibleNotesandContingentLiabilityDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#FairValueMeasurementsChangeinFairValueofConvertibleNotesandContingentLiabilityDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/FairValueMeasurementsChangeinFairValueofConvertibleNotesandContingentLiabilityDetails" xlink:type="extended" id="ifc9a4d7902dd4408b4dc0fd8ceb9270a_FairValueMeasurementsChangeinFairValueofConvertibleNotesandContingentLiabilityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_ceb97fde-d85c-4db3-a8b9-2b22bf778e08" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_d5c0f650-3ece-4266-87a1-6c7e8c2568da" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_ceb97fde-d85c-4db3-a8b9-2b22bf778e08" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_d5c0f650-3ece-4266-87a1-6c7e8c2568da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues_29f6853a-8a57-4bf2-bf0c-3b645e5b00e9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_ceb97fde-d85c-4db3-a8b9-2b22bf778e08" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues_29f6853a-8a57-4bf2-bf0c-3b645e5b00e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_692204b5-764a-4395-8e90-cf08d68f1208" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_ceb97fde-d85c-4db3-a8b9-2b22bf778e08" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_692204b5-764a-4395-8e90-cf08d68f1208" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_ab711390-e7cd-4ee3-bdf0-b29f5d3fbf97" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_ceb97fde-d85c-4db3-a8b9-2b22bf778e08" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_ab711390-e7cd-4ee3-bdf0-b29f5d3fbf97" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_70bef473-0484-4c15-814a-2f9ac987f25d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_36e500a5-e087-46ae-aa47-720c4032f7f3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_ceb97fde-d85c-4db3-a8b9-2b22bf778e08" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_36e500a5-e087-46ae-aa47-720c4032f7f3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_a7d432ce-3cca-4297-9e0e-fc67886a5586" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_36e500a5-e087-46ae-aa47-720c4032f7f3" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_a7d432ce-3cca-4297-9e0e-fc67886a5586" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_a7d432ce-3cca-4297-9e0e-fc67886a5586_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_a7d432ce-3cca-4297-9e0e-fc67886a5586" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_a7d432ce-3cca-4297-9e0e-fc67886a5586_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_07d2b16f-66ba-4496-8821-6035367f6d7e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_a7d432ce-3cca-4297-9e0e-fc67886a5586" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_07d2b16f-66ba-4496-8821-6035367f6d7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeMember_22b3bbb0-036f-466b-9992-ad19aff3c6f0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_07d2b16f-66ba-4496-8821-6035367f6d7e" xlink:to="loc_us-gaap_DerivativeMember_22b3bbb0-036f-466b-9992-ad19aff3c6f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_41493d2a-8402-4a9b-bcd6-2e47b68d2c97" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_07d2b16f-66ba-4496-8821-6035367f6d7e" xlink:to="loc_us-gaap_ConvertibleDebtMember_41493d2a-8402-4a9b-bcd6-2e47b68d2c97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ConvertibleDebtRevestingNotesMember_eb2c119d-6e01-4b29-bc38-0f5d85c0f20c" xlink:href="lifx-20220630.xsd#lifx_ConvertibleDebtRevestingNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConvertibleDebtMember_41493d2a-8402-4a9b-bcd6-2e47b68d2c97" xlink:to="loc_lifx_ConvertibleDebtRevestingNotesMember_eb2c119d-6e01-4b29-bc38-0f5d85c0f20c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContingentConsiderationMember_dbffdc56-ec5b-4dca-84f6-536b03e9fd10" xlink:href="lifx-20220630.xsd#lifx_ContingentConsiderationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_07d2b16f-66ba-4496-8821-6035367f6d7e" xlink:to="loc_lifx_ContingentConsiderationMember_dbffdc56-ec5b-4dca-84f6-536b03e9fd10" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_f5f116c9-428d-4b9e-bde4-add94a01ca05" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_36e500a5-e087-46ae-aa47-720c4032f7f3" xlink:to="loc_us-gaap_DebtInstrumentAxis_f5f116c9-428d-4b9e-bde4-add94a01ca05" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_f5f116c9-428d-4b9e-bde4-add94a01ca05_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_f5f116c9-428d-4b9e-bde4-add94a01ca05" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_f5f116c9-428d-4b9e-bde4-add94a01ca05_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_176ff77a-65eb-4189-8ba2-b192878e8a30" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_f5f116c9-428d-4b9e-bde4-add94a01ca05" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_176ff77a-65eb-4189-8ba2-b192878e8a30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ConvertibleNotesMember_feee6309-0c6f-4f62-b43f-4891693e35c7" xlink:href="lifx-20220630.xsd#lifx_ConvertibleNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_176ff77a-65eb-4189-8ba2-b192878e8a30" xlink:to="loc_lifx_ConvertibleNotesMember_feee6309-0c6f-4f62-b43f-4891693e35c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ConvertibleDebtRevestingNotesMember_1169edee-2a1e-4d07-8d5a-f158a838b577" xlink:href="lifx-20220630.xsd#lifx_ConvertibleDebtRevestingNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_176ff77a-65eb-4189-8ba2-b192878e8a30" xlink:to="loc_lifx_ConvertibleDebtRevestingNotesMember_1169edee-2a1e-4d07-8d5a-f158a838b577" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#FairValueMeasurementsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="extended" id="i861f996146e54a8aa54d27643b121e53_FairValueMeasurementsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a954ff9b-f0b6-459e-97eb-bf882fdc646d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_d611433f-9638-4070-867f-74f9d6c7d13a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a954ff9b-f0b6-459e-97eb-bf882fdc646d" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_d611433f-9638-4070-867f-74f9d6c7d13a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_deb3d48a-9b06-4631-8d0f-c501b6881875" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a954ff9b-f0b6-459e-97eb-bf882fdc646d" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_deb3d48a-9b06-4631-8d0f-c501b6881875" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d221bdb4-566b-49a8-bb12-969c60876319" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_a954ff9b-f0b6-459e-97eb-bf882fdc646d" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d221bdb4-566b-49a8-bb12-969c60876319" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_900ff0ca-e7cc-4ddc-808c-2b8a0d088685" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d221bdb4-566b-49a8-bb12-969c60876319" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_900ff0ca-e7cc-4ddc-808c-2b8a0d088685" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_900ff0ca-e7cc-4ddc-808c-2b8a0d088685_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_900ff0ca-e7cc-4ddc-808c-2b8a0d088685" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_900ff0ca-e7cc-4ddc-808c-2b8a0d088685_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_6f8f5154-3fe1-4260-b808-db8e798d6fa1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_900ff0ca-e7cc-4ddc-808c-2b8a0d088685" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_6f8f5154-3fe1-4260-b808-db8e798d6fa1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeMember_f0eb24d2-8008-4f80-ac90-ce3727acfd16" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_6f8f5154-3fe1-4260-b808-db8e798d6fa1" xlink:to="loc_us-gaap_DerivativeMember_f0eb24d2-8008-4f80-ac90-ce3727acfd16" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_8522a40d-9da1-46a9-a5ea-bc2152ddf0ed" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_6f8f5154-3fe1-4260-b808-db8e798d6fa1" xlink:to="loc_us-gaap_ConvertibleDebtMember_8522a40d-9da1-46a9-a5ea-bc2152ddf0ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContingentConsiderationMember_865e002e-a6f5-402a-9d6f-51cee4dc7963" xlink:href="lifx-20220630.xsd#lifx_ContingentConsiderationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_6f8f5154-3fe1-4260-b808-db8e798d6fa1" xlink:to="loc_lifx_ContingentConsiderationMember_865e002e-a6f5-402a-9d6f-51cee4dc7963" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/BusinessCombinationsJioNarrativeDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#BusinessCombinationsJioNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/BusinessCombinationsJioNarrativeDetails" xlink:type="extended" id="i6e606c7bc598462a93c0fc0317894752_BusinessCombinationsJioNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_e42cfd1f-e961-46e9-946c-1a9b47ae0225" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_e42cfd1f-e961-46e9-946c-1a9b47ae0225" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_7cb4aacd-adef-464e-96f5-0efbe7f0f270" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_7cb4aacd-adef-464e-96f5-0efbe7f0f270" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_b976d257-57c9-40e1-a5d1-7d01e150a80e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_b976d257-57c9-40e1-a5d1-7d01e150a80e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_43eab05d-9d34-4a94-85ca-b2b42e8bddec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_43eab05d-9d34-4a94-85ca-b2b42e8bddec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationConsiderationTransferredForgivenessOfLiabilities_334bd93b-f48f-4083-98d4-571e82ef5890" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationConsiderationTransferredForgivenessOfLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationConsiderationTransferredForgivenessOfLiabilities_334bd93b-f48f-4083-98d4-571e82ef5890" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationShareBasedCompensationValueAssumed_c123be2a-3c6a-4e50-be24-e3a665c7cf8f" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationShareBasedCompensationValueAssumed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationShareBasedCompensationValueAssumed_c123be2a-3c6a-4e50-be24-e3a665c7cf8f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationConsiderationTransferredShareBasedCompensationSharesAssumed_5fdc6d45-7bd6-4ebf-a6c2-a407c1bdd1b2" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationConsiderationTransferredShareBasedCompensationSharesAssumed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationConsiderationTransferredShareBasedCompensationSharesAssumed_5fdc6d45-7bd6-4ebf-a6c2-a407c1bdd1b2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_c0bd9d2c-89ea-43ef-989b-5b732207a6e3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_c0bd9d2c-89ea-43ef-989b-5b732207a6e3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_c1210adf-f2bf-41b3-bbbf-d189599ca5d3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_c1210adf-f2bf-41b3-bbbf-d189599ca5d3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationIndemnityEscrow_7a8f9ae1-a2d0-4ddc-81dc-d05947e97f56" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationIndemnityEscrow"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationIndemnityEscrow_7a8f9ae1-a2d0-4ddc-81dc-d05947e97f56" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationIndemnityEscrowTerm_4c5aa73f-b2ae-4e06-b5dd-87d0cbaf621c" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationIndemnityEscrowTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationIndemnityEscrowTerm_4c5aa73f-b2ae-4e06-b5dd-87d0cbaf621c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_08eafa32-143d-4df9-962c-d5861b0f2bed" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_08eafa32-143d-4df9-962c-d5861b0f2bed" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_DebtInstrumentConvertibleRepaymentOfPrincipalPercentagePerYear_a0ce8a9d-8f96-4f94-8efd-c3ee4a6aec23" xlink:href="lifx-20220630.xsd#lifx_DebtInstrumentConvertibleRepaymentOfPrincipalPercentagePerYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_DebtInstrumentConvertibleRepaymentOfPrincipalPercentagePerYear_a0ce8a9d-8f96-4f94-8efd-c3ee4a6aec23" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsideration_04fe1ddb-7777-4cc0-97e7-21d006eb5b87" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationExcludedConsideration_04fe1ddb-7777-4cc0-97e7-21d006eb5b87" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationRevestingStock_b4f8cbb1-b24b-479b-87cc-cebbaef5e7b6" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationRevestingStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationRevestingStock_b4f8cbb1-b24b-479b-87cc-cebbaef5e7b6" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationRevestingStockShares_6230179f-d45a-4b0d-b0c4-8964f3528b7a" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationRevestingStockShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationRevestingStockShares_6230179f-d45a-4b0d-b0c4-8964f3528b7a" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationRevestingConvertibleDebt_6f19b44f-631e-462d-b0dc-f1fe8290dcc3" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationRevestingConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationRevestingConvertibleDebt_6f19b44f-631e-462d-b0dc-f1fe8290dcc3" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationRetentionBonuses_79f59d52-1fd1-4fa1-8bdd-62fe30157fca" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationRetentionBonuses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationRetentionBonuses_79f59d52-1fd1-4fa1-8bdd-62fe30157fca" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationShareBasedCompensation_a8f8ab0c-d3b6-4485-87c0-72b355ec2bcc" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationShareBasedCompensation_a8f8ab0c-d3b6-4485-87c0-72b355ec2bcc" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationShareBasedCompensationShares_03e28c84-5650-425a-8474-fc06b4c58853" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationShareBasedCompensationShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationShareBasedCompensationShares_03e28c84-5650-425a-8474-fc06b4c58853" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_9fd5a7bd-5bdd-4ae1-a0fc-811d1968e1e8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_9fd5a7bd-5bdd-4ae1-a0fc-811d1968e1e8" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_b1cc05e8-24e0-4192-8443-a12f314c8c13" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_b1cc05e8-24e0-4192-8443-a12f314c8c13" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_4eb5cae8-94d1-4181-b29e-2cb9909812e2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_4eb5cae8-94d1-4181-b29e-2cb9909812e2" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_FairValueAdjustmentOfConvertibleNotes_4cce224e-ef0d-4051-a795-29bb1920cec5" xlink:href="lifx-20220630.xsd#lifx_FairValueAdjustmentOfConvertibleNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_FairValueAdjustmentOfConvertibleNotes_4cce224e-ef0d-4051-a795-29bb1920cec5" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_RetentionBonusesVestingPeriod_32c0cf4c-91de-437d-b2a2-12b0c992c715" xlink:href="lifx-20220630.xsd#lifx_RetentionBonusesVestingPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_RetentionBonusesVestingPeriod_32c0cf4c-91de-437d-b2a2-12b0c992c715" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationContingentConsiderationLiabilityShares_eb96c28b-863d-4401-88d2-4b7166d3258f" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationContingentConsiderationLiabilityShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationContingentConsiderationLiabilityShares_eb96c28b-863d-4401-88d2-4b7166d3258f" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContinentConsiderationTargetPercentage_13de3aa8-da31-4c84-a8df-608f5926e734" xlink:href="lifx-20220630.xsd#lifx_ContinentConsiderationTargetPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_ContinentConsiderationTargetPercentage_13de3aa8-da31-4c84-a8df-608f5926e734" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_679380f3-582e-4212-a4a8-f68c11d65333" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_679380f3-582e-4212-a4a8-f68c11d65333" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationContingentConsiderationLiabilityAmendmentPercentage_3448721d-6a86-434a-a78b-587db6b32648" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationContingentConsiderationLiabilityAmendmentPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_BusinessCombinationContingentConsiderationLiabilityAmendmentPercentage_3448721d-6a86-434a-a78b-587db6b32648" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_StockIssuedDuringPeriodSharesSettlementOfContingentConsideration_41444046-ba76-4154-973c-fee575085a35" xlink:href="lifx-20220630.xsd#lifx_StockIssuedDuringPeriodSharesSettlementOfContingentConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_StockIssuedDuringPeriodSharesSettlementOfContingentConsideration_41444046-ba76-4154-973c-fee575085a35" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_StockIssuedDuringPeriodValueSettlementOfContingentConsideration_f459799f-f5c6-4603-b073-8798dd22f638" xlink:href="lifx-20220630.xsd#lifx_StockIssuedDuringPeriodValueSettlementOfContingentConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_lifx_StockIssuedDuringPeriodValueSettlementOfContingentConsideration_f459799f-f5c6-4603-b073-8798dd22f638" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_edc2195c-2315-4253-91a0-0713a1377fbf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_edc2195c-2315-4253-91a0-0713a1377fbf" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_a01de290-b988-4dcd-96bf-33b62e94dab7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_a01de290-b988-4dcd-96bf-33b62e94dab7" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9f2e96f5-eee8-448a-8e80-a937446f4f8e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_cef6b488-f4f2-4c86-b34f-e6c136635f39" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9f2e96f5-eee8-448a-8e80-a937446f4f8e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_471fb506-3328-4ac2-9f44-bcb8ed70870c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9f2e96f5-eee8-448a-8e80-a937446f4f8e" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_471fb506-3328-4ac2-9f44-bcb8ed70870c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_471fb506-3328-4ac2-9f44-bcb8ed70870c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_471fb506-3328-4ac2-9f44-bcb8ed70870c" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_471fb506-3328-4ac2-9f44-bcb8ed70870c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f8e20d9f-473e-4b57-b0fd-3f5c313dcc7f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_471fb506-3328-4ac2-9f44-bcb8ed70870c" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f8e20d9f-473e-4b57-b0fd-3f5c313dcc7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_JiobitMember_a771417f-f70e-49b5-9c7e-5cb64c1b016a" xlink:href="lifx-20220630.xsd#lifx_JiobitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f8e20d9f-473e-4b57-b0fd-3f5c313dcc7f" xlink:to="loc_lifx_JiobitMember_a771417f-f70e-49b5-9c7e-5cb64c1b016a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_8b6b6398-af3c-4c79-ad6c-c7d6fa20cc0e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9f2e96f5-eee8-448a-8e80-a937446f4f8e" xlink:to="loc_us-gaap_AwardTypeAxis_8b6b6398-af3c-4c79-ad6c-c7d6fa20cc0e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8b6b6398-af3c-4c79-ad6c-c7d6fa20cc0e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_8b6b6398-af3c-4c79-ad6c-c7d6fa20cc0e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8b6b6398-af3c-4c79-ad6c-c7d6fa20cc0e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fb9bbd08-c0d4-47e3-812f-6a6f5c6c3359" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_8b6b6398-af3c-4c79-ad6c-c7d6fa20cc0e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fb9bbd08-c0d4-47e3-812f-6a6f5c6c3359" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_3f7292e2-c7b1-4789-92d8-8a9b24bb964f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fb9bbd08-c0d4-47e3-812f-6a6f5c6c3359" xlink:to="loc_us-gaap_EmployeeStockOptionMember_3f7292e2-c7b1-4789-92d8-8a9b24bb964f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_c1e18447-1e02-48ee-b699-c4260c2ec88d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fb9bbd08-c0d4-47e3-812f-6a6f5c6c3359" xlink:to="loc_us-gaap_RestrictedStockMember_c1e18447-1e02-48ee-b699-c4260c2ec88d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_RevestingStockMember_50d5f3c4-3a3f-4acd-a8fb-8a8fb410eb0b" xlink:href="lifx-20220630.xsd#lifx_RevestingStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fb9bbd08-c0d4-47e3-812f-6a6f5c6c3359" xlink:to="loc_lifx_RevestingStockMember_50d5f3c4-3a3f-4acd-a8fb-8a8fb410eb0b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ConvertibleDebtRevestingNotesMember_da0afd16-8c31-4318-8765-70b748de8942" xlink:href="lifx-20220630.xsd#lifx_ConvertibleDebtRevestingNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fb9bbd08-c0d4-47e3-812f-6a6f5c6c3359" xlink:to="loc_lifx_ConvertibleDebtRevestingNotesMember_da0afd16-8c31-4318-8765-70b748de8942" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_49e80554-a4cc-413e-860c-7f3413153478" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9f2e96f5-eee8-448a-8e80-a937446f4f8e" xlink:to="loc_us-gaap_DebtInstrumentAxis_49e80554-a4cc-413e-860c-7f3413153478" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_49e80554-a4cc-413e-860c-7f3413153478_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_49e80554-a4cc-413e-860c-7f3413153478" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_49e80554-a4cc-413e-860c-7f3413153478_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_8ad14216-90fb-4f2b-95d4-a0c9f483516d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_49e80554-a4cc-413e-860c-7f3413153478" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_8ad14216-90fb-4f2b-95d4-a0c9f483516d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_September2021ConvertibleNotesMember_92c6c113-880e-4b95-a28a-743d3e126747" xlink:href="lifx-20220630.xsd#lifx_September2021ConvertibleNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8ad14216-90fb-4f2b-95d4-a0c9f483516d" xlink:to="loc_lifx_September2021ConvertibleNotesMember_92c6c113-880e-4b95-a28a-743d3e126747" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_9c468415-a9eb-4ccb-a959-a660cadeba87" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9f2e96f5-eee8-448a-8e80-a937446f4f8e" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_9c468415-a9eb-4ccb-a959-a660cadeba87" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_9c468415-a9eb-4ccb-a959-a660cadeba87_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_9c468415-a9eb-4ccb-a959-a660cadeba87" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_9c468415-a9eb-4ccb-a959-a660cadeba87_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_662f1fad-9e38-4edf-a34a-25f9c23a1946" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_9c468415-a9eb-4ccb-a959-a660cadeba87" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_662f1fad-9e38-4edf-a34a-25f9c23a1946" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_1091e33e-b602-4b62-a9f0-fe45785d0e02" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_662f1fad-9e38-4edf-a34a-25f9c23a1946" xlink:to="loc_us-gaap_ConvertibleDebtMember_1091e33e-b602-4b62-a9f0-fe45785d0e02" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContingentConsiderationByTypeAxis_cebbbb23-fc1b-41c3-b5e3-f3c92ced6096" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContingentConsiderationByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9f2e96f5-eee8-448a-8e80-a937446f4f8e" xlink:to="loc_us-gaap_ContingentConsiderationByTypeAxis_cebbbb23-fc1b-41c3-b5e3-f3c92ced6096" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContingentConsiderationTypeDomain_cebbbb23-fc1b-41c3-b5e3-f3c92ced6096_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContingentConsiderationTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContingentConsiderationByTypeAxis_cebbbb23-fc1b-41c3-b5e3-f3c92ced6096" xlink:to="loc_us-gaap_ContingentConsiderationTypeDomain_cebbbb23-fc1b-41c3-b5e3-f3c92ced6096_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContingentConsiderationTypeDomain_2745bc5e-3afe-4b9d-861c-25a88de52549" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContingentConsiderationTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContingentConsiderationByTypeAxis_cebbbb23-fc1b-41c3-b5e3-f3c92ced6096" xlink:to="loc_us-gaap_ContingentConsiderationTypeDomain_2745bc5e-3afe-4b9d-861c-25a88de52549" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContingentConsideration2021Member_1aab87a9-4eca-466c-90f1-f10fb81fd383" xlink:href="lifx-20220630.xsd#lifx_ContingentConsideration2021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContingentConsiderationTypeDomain_2745bc5e-3afe-4b9d-861c-25a88de52549" xlink:to="loc_lifx_ContingentConsideration2021Member_1aab87a9-4eca-466c-90f1-f10fb81fd383" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContingentConsideration2022Member_042d551d-5dac-4f8f-ac7f-fca36069f327" xlink:href="lifx-20220630.xsd#lifx_ContingentConsideration2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContingentConsiderationTypeDomain_2745bc5e-3afe-4b9d-861c-25a88de52549" xlink:to="loc_lifx_ContingentConsideration2022Member_042d551d-5dac-4f8f-ac7f-fca36069f327" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContingentConsiderationTargetAxis_950884b6-e256-4e0d-aeb0-8f44c24204df" xlink:href="lifx-20220630.xsd#lifx_ContingentConsiderationTargetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9f2e96f5-eee8-448a-8e80-a937446f4f8e" xlink:to="loc_lifx_ContingentConsiderationTargetAxis_950884b6-e256-4e0d-aeb0-8f44c24204df" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContingentConsiderationTargetDomain_950884b6-e256-4e0d-aeb0-8f44c24204df_default" xlink:href="lifx-20220630.xsd#lifx_ContingentConsiderationTargetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_lifx_ContingentConsiderationTargetAxis_950884b6-e256-4e0d-aeb0-8f44c24204df" xlink:to="loc_lifx_ContingentConsiderationTargetDomain_950884b6-e256-4e0d-aeb0-8f44c24204df_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContingentConsiderationTargetDomain_80d24631-fb7f-4cf0-bf2e-460070e0582f" xlink:href="lifx-20220630.xsd#lifx_ContingentConsiderationTargetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_lifx_ContingentConsiderationTargetAxis_950884b6-e256-4e0d-aeb0-8f44c24204df" xlink:to="loc_lifx_ContingentConsiderationTargetDomain_80d24631-fb7f-4cf0-bf2e-460070e0582f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContingentConsiderationTargetOneMember_cb13cd4f-c004-4c0d-96a6-39c72f9f838d" xlink:href="lifx-20220630.xsd#lifx_ContingentConsiderationTargetOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lifx_ContingentConsiderationTargetDomain_80d24631-fb7f-4cf0-bf2e-460070e0582f" xlink:to="loc_lifx_ContingentConsiderationTargetOneMember_cb13cd4f-c004-4c0d-96a6-39c72f9f838d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContingentConsiderationTargetTwoMember_499371b6-3993-4296-b288-f5638f0f5328" xlink:href="lifx-20220630.xsd#lifx_ContingentConsiderationTargetTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lifx_ContingentConsiderationTargetDomain_80d24631-fb7f-4cf0-bf2e-460070e0582f" xlink:to="loc_lifx_ContingentConsiderationTargetTwoMember_499371b6-3993-4296-b288-f5638f0f5328" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ContingentConsiderationTargetThreeMember_4525d4c1-d4df-4104-8f1a-54629567395a" xlink:href="lifx-20220630.xsd#lifx_ContingentConsiderationTargetThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lifx_ContingentConsiderationTargetDomain_80d24631-fb7f-4cf0-bf2e-460070e0582f" xlink:to="loc_lifx_ContingentConsiderationTargetThreeMember_4525d4c1-d4df-4104-8f1a-54629567395a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_1d8d6c98-8c29-4c91-ace1-8b9217c28486" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9f2e96f5-eee8-448a-8e80-a937446f4f8e" xlink:to="loc_srt_RangeAxis_1d8d6c98-8c29-4c91-ace1-8b9217c28486" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1d8d6c98-8c29-4c91-ace1-8b9217c28486_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1d8d6c98-8c29-4c91-ace1-8b9217c28486" xlink:to="loc_srt_RangeMember_1d8d6c98-8c29-4c91-ace1-8b9217c28486_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_f263fcc0-f8b0-4f31-bc5c-b635f250b3d1" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1d8d6c98-8c29-4c91-ace1-8b9217c28486" xlink:to="loc_srt_RangeMember_f263fcc0-f8b0-4f31-bc5c-b635f250b3d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_b5f6ba9a-08f2-4036-8972-a0fab37e5749" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_f263fcc0-f8b0-4f31-bc5c-b635f250b3d1" xlink:to="loc_srt_MinimumMember_b5f6ba9a-08f2-4036-8972-a0fab37e5749" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_84900218-82fc-4368-aa90-45517051c9de" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_f263fcc0-f8b0-4f31-bc5c-b635f250b3d1" xlink:to="loc_srt_MaximumMember_84900218-82fc-4368-aa90-45517051c9de" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/BusinessCombinationsFairValueAssumptionsDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#BusinessCombinationsFairValueAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/BusinessCombinationsFairValueAssumptionsDetails" xlink:type="extended" id="i29db0352386248c7b4fdfc9db34ef735_BusinessCombinationsFairValueAssumptionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_e268063d-c1fd-470d-b1b2-3505678c3454" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_dcac0ec8-8c3b-4342-bdad-246f696dbf22" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_e268063d-c1fd-470d-b1b2-3505678c3454" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_dcac0ec8-8c3b-4342-bdad-246f696dbf22" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_96a5e844-a6db-453f-a3ea-11ab0be34f27" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_e268063d-c1fd-470d-b1b2-3505678c3454" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_96a5e844-a6db-453f-a3ea-11ab0be34f27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharePrice_c7ed8afd-bc62-465b-a204-69fb502cc7bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_e268063d-c1fd-470d-b1b2-3505678c3454" xlink:to="loc_us-gaap_SharePrice_c7ed8afd-bc62-465b-a204-69fb502cc7bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_26421666-16a8-4b1c-9113-5df28a6943d3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_e268063d-c1fd-470d-b1b2-3505678c3454" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_26421666-16a8-4b1c-9113-5df28a6943d3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentMeasurementInput_8fac25b8-be27-42ac-9b03-b765a70da558" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_e268063d-c1fd-470d-b1b2-3505678c3454" xlink:to="loc_us-gaap_DebtInstrumentMeasurementInput_8fac25b8-be27-42ac-9b03-b765a70da558" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_4c2fa23b-115a-4630-ac60-3934bf89525f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_e268063d-c1fd-470d-b1b2-3505678c3454" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_4c2fa23b-115a-4630-ac60-3934bf89525f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_8fca22f7-d0db-41ba-b083-30bbf7b1cd5d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_4c2fa23b-115a-4630-ac60-3934bf89525f" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_8fca22f7-d0db-41ba-b083-30bbf7b1cd5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_8fca22f7-d0db-41ba-b083-30bbf7b1cd5d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_8fca22f7-d0db-41ba-b083-30bbf7b1cd5d" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_8fca22f7-d0db-41ba-b083-30bbf7b1cd5d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_5be776c4-67f4-401c-9b4a-e02c7775d81f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_8fca22f7-d0db-41ba-b083-30bbf7b1cd5d" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_5be776c4-67f4-401c-9b4a-e02c7775d81f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_63ab1226-5c55-41f5-bf59-8ce5e353c9a7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_5be776c4-67f4-401c-9b4a-e02c7775d81f" xlink:to="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_63ab1226-5c55-41f5-bf59-8ce5e353c9a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputExpectedTermMember_5be7d557-dad5-464e-8f93-c865164bf010" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputExpectedTermMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_5be776c4-67f4-401c-9b4a-e02c7775d81f" xlink:to="loc_us-gaap_MeasurementInputExpectedTermMember_5be7d557-dad5-464e-8f93-c865164bf010" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputPriceVolatilityMember_36100503-6080-4814-a094-95f3e3097154" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputPriceVolatilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_5be776c4-67f4-401c-9b4a-e02c7775d81f" xlink:to="loc_us-gaap_MeasurementInputPriceVolatilityMember_36100503-6080-4814-a094-95f3e3097154" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputExpectedDividendRateMember_41e142ed-ecd7-4efd-8603-3134b3f1bd57" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputExpectedDividendRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_5be776c4-67f4-401c-9b4a-e02c7775d81f" xlink:to="loc_us-gaap_MeasurementInputExpectedDividendRateMember_41e142ed-ecd7-4efd-8603-3134b3f1bd57" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_52398ca7-05b6-47ea-b98f-4ddc066a35af" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_4c2fa23b-115a-4630-ac60-3934bf89525f" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_52398ca7-05b6-47ea-b98f-4ddc066a35af" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_52398ca7-05b6-47ea-b98f-4ddc066a35af_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_52398ca7-05b6-47ea-b98f-4ddc066a35af" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_52398ca7-05b6-47ea-b98f-4ddc066a35af_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_d50b64dd-eef9-4a15-9ae1-9f3a5c6df343" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_52398ca7-05b6-47ea-b98f-4ddc066a35af" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_d50b64dd-eef9-4a15-9ae1-9f3a5c6df343" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_0f43678d-efd1-420c-95ae-a388781a77f8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_d50b64dd-eef9-4a15-9ae1-9f3a5c6df343" xlink:to="loc_us-gaap_ConvertibleDebtMember_0f43678d-efd1-420c-95ae-a388781a77f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_3c65ff91-c5a9-4af1-acbd-3b3e11d56906" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_4c2fa23b-115a-4630-ac60-3934bf89525f" xlink:to="loc_us-gaap_DebtInstrumentAxis_3c65ff91-c5a9-4af1-acbd-3b3e11d56906" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_3c65ff91-c5a9-4af1-acbd-3b3e11d56906_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_3c65ff91-c5a9-4af1-acbd-3b3e11d56906" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_3c65ff91-c5a9-4af1-acbd-3b3e11d56906_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_9511c6a9-891f-4726-becf-c2eb1de742ff" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_3c65ff91-c5a9-4af1-acbd-3b3e11d56906" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_9511c6a9-891f-4726-becf-c2eb1de742ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_September2021ConvertibleNotesMember_1d4c4a3e-7b49-4cea-82ec-5ea466d0121f" xlink:href="lifx-20220630.xsd#lifx_September2021ConvertibleNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9511c6a9-891f-4726-becf-c2eb1de742ff" xlink:to="loc_lifx_September2021ConvertibleNotesMember_1d4c4a3e-7b49-4cea-82ec-5ea466d0121f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/BusinessCombinationsAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#BusinessCombinationsAssetsAcquiredandLiabilitiesAssumedDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/BusinessCombinationsAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="extended" id="i0f18c2196bb040d392d44c05958c8ac8_BusinessCombinationsAssetsAcquiredandLiabilitiesAssumedDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssetsNet_54671638-b941-4ccc-9f35-316025e191dd" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_lifx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssetsNet_54671638-b941-4ccc-9f35-316025e191dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_d1490755-8f40-4988-a4dd-c96c39b2fa7b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_d1490755-8f40-4988-a4dd-c96c39b2fa7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRestrictedCash_bbc7ff35-1ae4-4354-9e0a-2f7902c6e438" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRestrictedCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_lifx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRestrictedCash_bbc7ff35-1ae4-4354-9e0a-2f7902c6e438" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_6d8b622a-c08f-4898-8dac-2f4a599aa226" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_6d8b622a-c08f-4898-8dac-2f4a599aa226" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_17e5b7b1-59ae-435a-a4a7-911ad33310d7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_17e5b7b1-59ae-435a-a4a7-911ad33310d7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_a063ea09-f64f-494a-a181-818741723702" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_a063ea09-f64f-494a-a181-818741723702" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_ec441e51-04fe-4158-a966-369608eea40d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_ec441e51-04fe-4158-a966-369608eea40d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssetsPrepaidExpenseAndOtherAssets_0fe5ac03-a57c-4c96-9381-8a9d2cb6d8db" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssetsPrepaidExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_lifx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssetsPrepaidExpenseAndOtherAssets_0fe5ac03-a57c-4c96-9381-8a9d2cb6d8db" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_fc5403ee-9ada-4f48-a3ba-e070095211ba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_fc5403ee-9ada-4f48-a3ba-e070095211ba" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_01244d30-0ccb-4d0e-9244-ad25ac2b5011" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_Goodwill_01244d30-0ccb-4d0e-9244-ad25ac2b5011" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_90927cf2-70ca-4110-909b-7d21559c65ef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_90927cf2-70ca-4110-909b-7d21559c65ef" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_a3e55d00-b4a7-4b19-8633-6cee4e1f7253" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_a3e55d00-b4a7-4b19-8633-6cee4e1f7253" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_80ffcd00-a183-4610-8d3e-4722fcb4cd07" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_80ffcd00-a183-4610-8d3e-4722fcb4cd07" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue_b70e5ec1-bc41-43a2-8a36-67594191cfe9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue_b70e5ec1-bc41-43a2-8a36-67594191cfe9" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_6207e333-2d7e-4a1b-83d0-348969f9e776" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_6207e333-2d7e-4a1b-83d0-348969f9e776" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c415d1f3-3902-49fb-b50d-ce60d2a66b17" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9c0432c2-7e23-49b0-b93c-3bf1975f7a53" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c415d1f3-3902-49fb-b50d-ce60d2a66b17" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_b610d5cc-e410-49d9-929b-ee0f40209809" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_c415d1f3-3902-49fb-b50d-ce60d2a66b17" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_b610d5cc-e410-49d9-929b-ee0f40209809" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b610d5cc-e410-49d9-929b-ee0f40209809_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_b610d5cc-e410-49d9-929b-ee0f40209809" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b610d5cc-e410-49d9-929b-ee0f40209809_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_319ea174-b145-41b9-8bf4-be9565df6460" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_b610d5cc-e410-49d9-929b-ee0f40209809" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_319ea174-b145-41b9-8bf4-be9565df6460" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_JiobitMember_29d2bc3b-18a1-4d33-9331-a9b702b6f2db" xlink:href="lifx-20220630.xsd#lifx_JiobitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_319ea174-b145-41b9-8bf4-be9565df6460" xlink:to="loc_lifx_JiobitMember_29d2bc3b-18a1-4d33-9331-a9b702b6f2db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_TileIncMember_b0dadd97-b579-4606-8657-d14dcbd9c891" xlink:href="lifx-20220630.xsd#lifx_TileIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_319ea174-b145-41b9-8bf4-be9565df6460" xlink:to="loc_lifx_TileIncMember_b0dadd97-b579-4606-8657-d14dcbd9c891" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/BusinessCombinationsIdentifiableIntangibleAssetsAcquiredDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#BusinessCombinationsIdentifiableIntangibleAssetsAcquiredDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/BusinessCombinationsIdentifiableIntangibleAssetsAcquiredDetails" xlink:type="extended" id="ic5c705f6ad714b73871a1ee19c963555_BusinessCombinationsIdentifiableIntangibleAssetsAcquiredDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_5795d989-75c5-43ee-9da2-610a34cb81d3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_1b91fb8c-eccd-4237-93e8-45d7de2ca9c0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_5795d989-75c5-43ee-9da2-610a34cb81d3" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_1b91fb8c-eccd-4237-93e8-45d7de2ca9c0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_bf76b3b3-716d-4c9e-9224-e1bd687def56" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_5795d989-75c5-43ee-9da2-610a34cb81d3" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_bf76b3b3-716d-4c9e-9224-e1bd687def56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_9e45a138-b85b-40e0-a2db-a6ce1021cd15" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_5795d989-75c5-43ee-9da2-610a34cb81d3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_9e45a138-b85b-40e0-a2db-a6ce1021cd15" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_0fa2a361-46d8-477a-8352-440ea5bccf62" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_9e45a138-b85b-40e0-a2db-a6ce1021cd15" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_0fa2a361-46d8-477a-8352-440ea5bccf62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0fa2a361-46d8-477a-8352-440ea5bccf62_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_0fa2a361-46d8-477a-8352-440ea5bccf62" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0fa2a361-46d8-477a-8352-440ea5bccf62_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cffe5185-6f5d-4008-9cbf-716310df2492" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_0fa2a361-46d8-477a-8352-440ea5bccf62" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cffe5185-6f5d-4008-9cbf-716310df2492" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_JiobitMember_f5a0a105-6a15-400f-8baf-508bded62e75" xlink:href="lifx-20220630.xsd#lifx_JiobitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cffe5185-6f5d-4008-9cbf-716310df2492" xlink:to="loc_lifx_JiobitMember_f5a0a105-6a15-400f-8baf-508bded62e75" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_TileIncMember_17b690da-3993-4256-9da4-c7f046c545c5" xlink:href="lifx-20220630.xsd#lifx_TileIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cffe5185-6f5d-4008-9cbf-716310df2492" xlink:to="loc_lifx_TileIncMember_17b690da-3993-4256-9da4-c7f046c545c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c03005a5-46bc-4577-9b03-7a56cf798703" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_9e45a138-b85b-40e0-a2db-a6ce1021cd15" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c03005a5-46bc-4577-9b03-7a56cf798703" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c03005a5-46bc-4577-9b03-7a56cf798703_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c03005a5-46bc-4577-9b03-7a56cf798703" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c03005a5-46bc-4577-9b03-7a56cf798703_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4c9699f4-5606-4fa0-8341-a25ca219c580" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c03005a5-46bc-4577-9b03-7a56cf798703" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4c9699f4-5606-4fa0-8341-a25ca219c580" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_32e0bdc1-02be-4c6a-83cf-1ff00b12ea80" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4c9699f4-5606-4fa0-8341-a25ca219c580" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_32e0bdc1-02be-4c6a-83cf-1ff00b12ea80" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_beb504e3-bc54-4252-8dc7-579fe4c74a09" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4c9699f4-5606-4fa0-8341-a25ca219c580" xlink:to="loc_us-gaap_TradeNamesMember_beb504e3-bc54-4252-8dc7-579fe4c74a09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_cb1c7fb1-1237-4f81-9e27-60bfdd78cf7d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4c9699f4-5606-4fa0-8341-a25ca219c580" xlink:to="loc_us-gaap_CustomerRelationshipsMember_cb1c7fb1-1237-4f81-9e27-60bfdd78cf7d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/BusinessCombinationsTileNarrativeDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#BusinessCombinationsTileNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/BusinessCombinationsTileNarrativeDetails" xlink:type="extended" id="i8a7a25531fb646ac9e0f435916125eea_BusinessCombinationsTileNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_11c9ce85-43cc-433c-bc1c-bdda656475cf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_11c9ce85-43cc-433c-bc1c-bdda656475cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_b88eacd3-64a3-42ed-9f02-e4e9495fe4fa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_b88eacd3-64a3-42ed-9f02-e4e9495fe4fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_62d93fc2-f0c4-468f-9c24-fcd69442da12" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_62d93fc2-f0c4-468f-9c24-fcd69442da12" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_793d59f7-7023-430a-ac52-5d13e35a4cd7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_793d59f7-7023-430a-ac52-5d13e35a4cd7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationContingentConsiderationLiabilityShares_0fdb0fc6-02fc-4669-b6a5-d35b16444858" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationContingentConsiderationLiabilityShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_lifx_BusinessCombinationContingentConsiderationLiabilityShares_0fdb0fc6-02fc-4669-b6a5-d35b16444858" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationIndemnityEscrow_2bfe8b49-3ce7-49e0-b77a-f4f1aa227451" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationIndemnityEscrow"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_lifx_BusinessCombinationIndemnityEscrow_2bfe8b49-3ce7-49e0-b77a-f4f1aa227451" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationAndSharesIssuedToKeyEmployeeIndemnityEscrow_60899c7e-c17d-434f-baa9-6d343d69f360" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationAndSharesIssuedToKeyEmployeeIndemnityEscrow"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_lifx_BusinessCombinationAndSharesIssuedToKeyEmployeeIndemnityEscrow_60899c7e-c17d-434f-baa9-6d343d69f360" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationIndemnityEscrowTerm_cac424d9-2486-4711-a6ee-39309fc9b520" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationIndemnityEscrowTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_lifx_BusinessCombinationIndemnityEscrowTerm_cac424d9-2486-4711-a6ee-39309fc9b520" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsideration_ac5ad722-ed26-4f8b-a4f0-cf42bc871430" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_lifx_BusinessCombinationExcludedConsideration_ac5ad722-ed26-4f8b-a4f0-cf42bc871430" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationShareBasedCompensationShares_ea52cf47-aa78-4535-883e-41bb64a0a702" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationShareBasedCompensationShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationShareBasedCompensationShares_ea52cf47-aa78-4535-883e-41bb64a0a702" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationShareBasedCompensation_c766033f-b81c-48e9-81ba-eac330fb3928" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationShareBasedCompensation_c766033f-b81c-48e9-81ba-eac330fb3928" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationRetentionBonuses_ad7c6d3a-4bb6-43e8-b352-ac9361f605e0" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationRetentionBonuses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationRetentionBonuses_ad7c6d3a-4bb6-43e8-b352-ac9361f605e0" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_11e19f4b-3c0f-4f66-b73d-73d5d6311b7c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_11e19f4b-3c0f-4f66-b73d-73d5d6311b7c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationSharesGranted_f025712e-a67e-4ea4-b892-4ffe2d77b37d" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationSharesGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationSharesGranted_f025712e-a67e-4ea4-b892-4ffe2d77b37d" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationContingentConsiderationSharesGranted_64d2bd53-dc6e-4672-9be9-4222b0f12425" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationContingentConsiderationSharesGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationContingentConsiderationSharesGranted_64d2bd53-dc6e-4672-9be9-4222b0f12425" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_12cb7827-7a34-4986-b67a-f23f7f5f1ec6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_12cb7827-7a34-4986-b67a-f23f7f5f1ec6" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_11709976-3766-44ed-904f-e4884c6c5bd2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2a5ac48e-9b98-4d02-bee4-7c230dc28946" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_11709976-3766-44ed-904f-e4884c6c5bd2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_8feb1581-ab44-42fd-918d-12d3ca330b57" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_11709976-3766-44ed-904f-e4884c6c5bd2" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_8feb1581-ab44-42fd-918d-12d3ca330b57" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8feb1581-ab44-42fd-918d-12d3ca330b57_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_8feb1581-ab44-42fd-918d-12d3ca330b57" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8feb1581-ab44-42fd-918d-12d3ca330b57_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_39a5ed0b-191e-4296-aefd-fa3ea54771d0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_8feb1581-ab44-42fd-918d-12d3ca330b57" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_39a5ed0b-191e-4296-aefd-fa3ea54771d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_TileIncMember_f9d6c430-6db5-4467-88ac-eeb721c58169" xlink:href="lifx-20220630.xsd#lifx_TileIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_39a5ed0b-191e-4296-aefd-fa3ea54771d0" xlink:to="loc_lifx_TileIncMember_f9d6c430-6db5-4467-88ac-eeb721c58169" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_bd959b36-b44f-4035-a9ac-efcaa9d4b6e2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_11709976-3766-44ed-904f-e4884c6c5bd2" xlink:to="loc_us-gaap_AwardTypeAxis_bd959b36-b44f-4035-a9ac-efcaa9d4b6e2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_bd959b36-b44f-4035-a9ac-efcaa9d4b6e2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_bd959b36-b44f-4035-a9ac-efcaa9d4b6e2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_bd959b36-b44f-4035-a9ac-efcaa9d4b6e2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e20c0f37-845a-49e5-b6e1-e6624d6a0b1a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_bd959b36-b44f-4035-a9ac-efcaa9d4b6e2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e20c0f37-845a-49e5-b6e1-e6624d6a0b1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_cbeedecd-47a8-4609-8137-ddccbb911029" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e20c0f37-845a-49e5-b6e1-e6624d6a0b1a" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_cbeedecd-47a8-4609-8137-ddccbb911029" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_ea4e7881-1e8d-48e5-bb7b-1aeac6831d73" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e20c0f37-845a-49e5-b6e1-e6624d6a0b1a" xlink:to="loc_us-gaap_EmployeeStockOptionMember_ea4e7881-1e8d-48e5-bb7b-1aeac6831d73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_3f4823b4-8916-4bb6-9a77-a421e50eb006" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e20c0f37-845a-49e5-b6e1-e6624d6a0b1a" xlink:to="loc_us-gaap_PerformanceSharesMember_3f4823b4-8916-4bb6-9a77-a421e50eb006" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_a74c08e3-4cd2-4a1b-ad5e-52c6113a05e5" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_11709976-3766-44ed-904f-e4884c6c5bd2" xlink:to="loc_srt_RangeAxis_a74c08e3-4cd2-4a1b-ad5e-52c6113a05e5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a74c08e3-4cd2-4a1b-ad5e-52c6113a05e5_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_a74c08e3-4cd2-4a1b-ad5e-52c6113a05e5" xlink:to="loc_srt_RangeMember_a74c08e3-4cd2-4a1b-ad5e-52c6113a05e5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_250c8777-5a98-4706-aaaa-45a695b4c65f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_a74c08e3-4cd2-4a1b-ad5e-52c6113a05e5" xlink:to="loc_srt_RangeMember_250c8777-5a98-4706-aaaa-45a695b4c65f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_863be16f-4b58-4a04-90cd-c5b4b240ba34" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_250c8777-5a98-4706-aaaa-45a695b4c65f" xlink:to="loc_srt_MinimumMember_863be16f-4b58-4a04-90cd-c5b4b240ba34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_d0ea440c-68a3-4803-8f93-f83c03568d4f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_250c8777-5a98-4706-aaaa-45a695b4c65f" xlink:to="loc_srt_MaximumMember_d0ea440c-68a3-4803-8f93-f83c03568d4f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/BalanceSheetComponentsPropertyandEquipmentNetDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#BalanceSheetComponentsPropertyandEquipmentNetDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/BalanceSheetComponentsPropertyandEquipmentNetDetails" xlink:type="extended" id="ifaac31aa78884efca99622701fe9b00d_BalanceSheetComponentsPropertyandEquipmentNetDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5a5f7043-d146-47f7-92b6-dc2ce0a36760" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_88a26800-cc97-4c22-bdd9-2fb73aed4967" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5a5f7043-d146-47f7-92b6-dc2ce0a36760" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_88a26800-cc97-4c22-bdd9-2fb73aed4967" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_96e94891-f65f-4b78-a675-bdbcd571c6e7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5a5f7043-d146-47f7-92b6-dc2ce0a36760" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_96e94891-f65f-4b78-a675-bdbcd571c6e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_8aa7760e-2799-463e-9eae-87aa5b0f4e5f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5a5f7043-d146-47f7-92b6-dc2ce0a36760" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_8aa7760e-2799-463e-9eae-87aa5b0f4e5f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_d7700e98-acc8-43fb-a3f7-2940b1b636d1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Depreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5a5f7043-d146-47f7-92b6-dc2ce0a36760" xlink:to="loc_us-gaap_Depreciation_d7700e98-acc8-43fb-a3f7-2940b1b636d1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_62679685-abc7-47ca-abda-6b34be656d53" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5a5f7043-d146-47f7-92b6-dc2ce0a36760" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_62679685-abc7-47ca-abda-6b34be656d53" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b7e3d36f-5250-46bf-b8a9-a1a8e4fe891c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_62679685-abc7-47ca-abda-6b34be656d53" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b7e3d36f-5250-46bf-b8a9-a1a8e4fe891c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b7e3d36f-5250-46bf-b8a9-a1a8e4fe891c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b7e3d36f-5250-46bf-b8a9-a1a8e4fe891c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b7e3d36f-5250-46bf-b8a9-a1a8e4fe891c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5caf392-ce5f-42a4-9c3d-cb41004acb4d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b7e3d36f-5250-46bf-b8a9-a1a8e4fe891c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5caf392-ce5f-42a4-9c3d-cb41004acb4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerEquipmentMember_d1e1dad5-ecbe-414b-96d6-d3290ac2f75f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ComputerEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5caf392-ce5f-42a4-9c3d-cb41004acb4d" xlink:to="loc_us-gaap_ComputerEquipmentMember_d1e1dad5-ecbe-414b-96d6-d3290ac2f75f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_716e7b88-816b-4238-8bad-649cae4ea75a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5caf392-ce5f-42a4-9c3d-cb41004acb4d" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_716e7b88-816b-4238-8bad-649cae4ea75a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ProductionManufacturingEquipmentMember_b5a80c4f-ce1d-4ce5-90f5-4793d3513a99" xlink:href="lifx-20220630.xsd#lifx_ProductionManufacturingEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5caf392-ce5f-42a4-9c3d-cb41004acb4d" xlink:to="loc_lifx_ProductionManufacturingEquipmentMember_b5a80c4f-ce1d-4ce5-90f5-4793d3513a99" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_2096c426-8888-4668-80f0-7e00420ede0a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5caf392-ce5f-42a4-9c3d-cb41004acb4d" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_2096c426-8888-4668-80f0-7e00420ede0a" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/BalanceSheetComponentsLeasesDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#BalanceSheetComponentsLeasesDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/BalanceSheetComponentsLeasesDetails" xlink:type="extended" id="i8d919cbc07d749ffa0a4365a4581a2b4_BalanceSheetComponentsLeasesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_db760d1a-efcd-436c-aca6-35f0579e1eae" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_793f1bd8-3f14-4c8f-aa92-d31157d26b26" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseRemainingLeaseTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_db760d1a-efcd-436c-aca6-35f0579e1eae" xlink:to="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_793f1bd8-3f14-4c8f-aa92-d31157d26b26" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_af403837-5d9f-4f84-8955-63197add281b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_db760d1a-efcd-436c-aca6-35f0579e1eae" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_af403837-5d9f-4f84-8955-63197add281b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_740d48ae-aa63-4d9f-82b5-2ed9755654d8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_db760d1a-efcd-436c-aca6-35f0579e1eae" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_740d48ae-aa63-4d9f-82b5-2ed9755654d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_8f77f8e1-a0c0-460d-b7ab-e03c3b4c5fd1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_db760d1a-efcd-436c-aca6-35f0579e1eae" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_8f77f8e1-a0c0-460d-b7ab-e03c3b4c5fd1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_3f0c47ca-20b6-4f7f-8a39-cde2dfee6a87" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_db760d1a-efcd-436c-aca6-35f0579e1eae" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_3f0c47ca-20b6-4f7f-8a39-cde2dfee6a87" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_d600b174-f24d-4307-9090-7e618686beec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_db760d1a-efcd-436c-aca6-35f0579e1eae" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_d600b174-f24d-4307-9090-7e618686beec" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_663d7a3b-7232-4f8a-ba6a-c53aaebb07d3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_db760d1a-efcd-436c-aca6-35f0579e1eae" xlink:to="loc_us-gaap_OperatingLeaseCost_663d7a3b-7232-4f8a-ba6a-c53aaebb07d3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_e7b0066b-279b-4302-bd08-c199bc7c5975" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_db760d1a-efcd-436c-aca6-35f0579e1eae" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_e7b0066b-279b-4302-bd08-c199bc7c5975" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_fee84bc0-6fba-4258-9717-cbea5f4d02b0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_db760d1a-efcd-436c-aca6-35f0579e1eae" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_fee84bc0-6fba-4258-9717-cbea5f4d02b0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_dda58039-13fd-40f4-a1d9-9c386296ddee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_db760d1a-efcd-436c-aca6-35f0579e1eae" xlink:to="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_dda58039-13fd-40f4-a1d9-9c386296ddee" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_fb7f9bfb-0620-4e1f-808f-f1f350d4f3b3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_dda58039-13fd-40f4-a1d9-9c386296ddee" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_fb7f9bfb-0620-4e1f-808f-f1f350d4f3b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_18cee5f8-9a52-47f3-acd7-2e602064cfea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_dda58039-13fd-40f4-a1d9-9c386296ddee" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_18cee5f8-9a52-47f3-acd7-2e602064cfea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_bbd23bf4-0eac-474d-b974-83529898f851" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_dda58039-13fd-40f4-a1d9-9c386296ddee" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_bbd23bf4-0eac-474d-b974-83529898f851" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_daae9a7f-f58c-4835-a662-836e875f6de5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_dda58039-13fd-40f4-a1d9-9c386296ddee" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_daae9a7f-f58c-4835-a662-836e875f6de5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_3c5e105d-c8de-4b43-a0ac-5d599dddc7a0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_dda58039-13fd-40f4-a1d9-9c386296ddee" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_3c5e105d-c8de-4b43-a0ac-5d599dddc7a0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_6c12619b-709e-4995-81ac-ef3391ef6018" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_dda58039-13fd-40f4-a1d9-9c386296ddee" xlink:to="loc_us-gaap_OperatingLeaseLiability_6c12619b-709e-4995-81ac-ef3391ef6018" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_cd0e4001-1093-4713-a821-e49af2fcfd21" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_db760d1a-efcd-436c-aca6-35f0579e1eae" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_cd0e4001-1093-4713-a821-e49af2fcfd21" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_694786dd-747d-472e-824d-3474ce096c9e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_cd0e4001-1093-4713-a821-e49af2fcfd21" xlink:to="loc_srt_RangeAxis_694786dd-747d-472e-824d-3474ce096c9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_694786dd-747d-472e-824d-3474ce096c9e_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_694786dd-747d-472e-824d-3474ce096c9e" xlink:to="loc_srt_RangeMember_694786dd-747d-472e-824d-3474ce096c9e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_c6566b14-2d22-404e-a064-910660824381" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_694786dd-747d-472e-824d-3474ce096c9e" xlink:to="loc_srt_RangeMember_c6566b14-2d22-404e-a064-910660824381" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_326500b8-9af6-4c35-988f-ce270625eb81" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c6566b14-2d22-404e-a064-910660824381" xlink:to="loc_srt_MinimumMember_326500b8-9af6-4c35-988f-ce270625eb81" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_c0b31116-b355-4c35-a878-3d7b611f8687" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c6566b14-2d22-404e-a064-910660824381" xlink:to="loc_srt_MaximumMember_c0b31116-b355-4c35-a878-3d7b611f8687" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/BalanceSheetComponentsIntangibleAssetsNetDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#BalanceSheetComponentsIntangibleAssetsNetDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/BalanceSheetComponentsIntangibleAssetsNetDetails" xlink:type="extended" id="i626eb76eb75447bcb5e6eaef446cc6c8_BalanceSheetComponentsIntangibleAssetsNetDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_82b3553d-9a03-4358-9279-3ee2f2bb38c5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_16df4620-2701-46e0-aa89-be2a0a277298" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_82b3553d-9a03-4358-9279-3ee2f2bb38c5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_16df4620-2701-46e0-aa89-be2a0a277298" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_d683a161-e0b7-47c8-bcc0-4b581a6c5b3a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_82b3553d-9a03-4358-9279-3ee2f2bb38c5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_d683a161-e0b7-47c8-bcc0-4b581a6c5b3a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_b5b4a9ca-d1f7-492f-8934-84394ab58812" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_82b3553d-9a03-4358-9279-3ee2f2bb38c5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_b5b4a9ca-d1f7-492f-8934-84394ab58812" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_54cd434b-0777-4769-af0b-e52f4b226274" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_82b3553d-9a03-4358-9279-3ee2f2bb38c5" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_54cd434b-0777-4769-af0b-e52f4b226274" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_78d6a4ff-9a93-4910-9163-6a52077cbb39" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_54cd434b-0777-4769-af0b-e52f4b226274" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_78d6a4ff-9a93-4910-9163-6a52077cbb39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_78d6a4ff-9a93-4910-9163-6a52077cbb39_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_78d6a4ff-9a93-4910-9163-6a52077cbb39" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_78d6a4ff-9a93-4910-9163-6a52077cbb39_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_935b3f63-9afa-4799-a76b-c9e53cc3b2c0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_78d6a4ff-9a93-4910-9163-6a52077cbb39" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_935b3f63-9afa-4799-a76b-c9e53cc3b2c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntellectualPropertyMember_c0e9c0ad-7610-40b5-b30c-d11cf025d558" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntellectualPropertyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_935b3f63-9afa-4799-a76b-c9e53cc3b2c0" xlink:to="loc_us-gaap_IntellectualPropertyMember_c0e9c0ad-7610-40b5-b30c-d11cf025d558" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LicenseMember_ba91e9d9-73d5-4228-8dfd-646cd2f99fd3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LicenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_935b3f63-9afa-4799-a76b-c9e53cc3b2c0" xlink:to="loc_us-gaap_LicenseMember_ba91e9d9-73d5-4228-8dfd-646cd2f99fd3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_6a0e30cf-9089-4f5f-8a26-299fd213b505" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_935b3f63-9afa-4799-a76b-c9e53cc3b2c0" xlink:to="loc_us-gaap_TradeNamesMember_6a0e30cf-9089-4f5f-8a26-299fd213b505" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_81f4fdcf-947a-495a-8dc5-862366735aa4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TechnologyBasedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_935b3f63-9afa-4799-a76b-c9e53cc3b2c0" xlink:to="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_81f4fdcf-947a-495a-8dc5-862366735aa4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_c9c9d0f1-3529-4fde-9ead-58be93c424a3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_935b3f63-9afa-4799-a76b-c9e53cc3b2c0" xlink:to="loc_us-gaap_CustomerRelationshipsMember_c9c9d0f1-3529-4fde-9ead-58be93c424a3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_17ffa858-1028-480e-8c9d-c08c25d0334e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_935b3f63-9afa-4799-a76b-c9e53cc3b2c0" xlink:to="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_17ffa858-1028-480e-8c9d-c08c25d0334e" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/BalanceSheetComponentsIntangibleAssetsWeightedAverageRemainingUsefulLifeDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#BalanceSheetComponentsIntangibleAssetsWeightedAverageRemainingUsefulLifeDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/BalanceSheetComponentsIntangibleAssetsWeightedAverageRemainingUsefulLifeDetails" xlink:type="extended" id="i824d6de1b46a4330b70570eee973d14b_BalanceSheetComponentsIntangibleAssetsWeightedAverageRemainingUsefulLifeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_b9e41f95-8506-4fd3-82d2-0e5ff6f2608c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_094e4c8b-9d07-4725-8b42-6a43a6670cf6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_b9e41f95-8506-4fd3-82d2-0e5ff6f2608c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_094e4c8b-9d07-4725-8b42-6a43a6670cf6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_768ccdba-1c5a-4a08-9ad5-a1294716b9cd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_b9e41f95-8506-4fd3-82d2-0e5ff6f2608c" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_768ccdba-1c5a-4a08-9ad5-a1294716b9cd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1bb83960-5839-432f-9587-5bee0aed2dbb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_768ccdba-1c5a-4a08-9ad5-a1294716b9cd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1bb83960-5839-432f-9587-5bee0aed2dbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1bb83960-5839-432f-9587-5bee0aed2dbb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1bb83960-5839-432f-9587-5bee0aed2dbb" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1bb83960-5839-432f-9587-5bee0aed2dbb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_717a8134-118a-40cc-93a4-13a09d3c8597" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1bb83960-5839-432f-9587-5bee0aed2dbb" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_717a8134-118a-40cc-93a4-13a09d3c8597" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_78af24b9-7875-4fe5-8101-0969a8eb7d53" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_717a8134-118a-40cc-93a4-13a09d3c8597" xlink:to="loc_us-gaap_TradeNamesMember_78af24b9-7875-4fe5-8101-0969a8eb7d53" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_05b740c1-003c-48e0-bf5f-058894449939" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TechnologyBasedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_717a8134-118a-40cc-93a4-13a09d3c8597" xlink:to="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_05b740c1-003c-48e0-bf5f-058894449939" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_956e13d2-bfe1-4dc1-b456-e3e993fcaf3c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_717a8134-118a-40cc-93a4-13a09d3c8597" xlink:to="loc_us-gaap_CustomerRelationshipsMember_956e13d2-bfe1-4dc1-b456-e3e993fcaf3c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/ConvertibleNotesNarrativeDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#ConvertibleNotesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/ConvertibleNotesNarrativeDetails" xlink:type="extended" id="i5e3a75e2b15c41fbafce9b6183fb3be2_ConvertibleNotesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_7e69182d-8003-4eaa-82bb-a59020c0e653" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_7e69182d-8003-4eaa-82bb-a59020c0e653" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_5c29b9b1-5160-404b-a2f4-a9ea3d50f351" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_5c29b9b1-5160-404b-a2f4-a9ea3d50f351" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_8ab911f1-e565-427b-a6c9-aa978235fe33" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_8ab911f1-e565-427b-a6c9-aa978235fe33" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_d0773c7e-c816-4a3f-bc4b-a3bb45b3b5cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_DerivativeLiabilities_d0773c7e-c816-4a3f-bc4b-a3bb45b3b5cb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_1745f295-79f0-4e82-a130-5dcb2b6abafe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_1745f295-79f0-4e82-a130-5dcb2b6abafe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_bf98527c-d395-4aa0-afcc-c15b45ff595a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_LongTermDebt_bf98527c-d395-4aa0-afcc-c15b45ff595a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_DebtInstrumentConvertibleIfConvertedValueInExcessOfBelowPrincipal_20f3b105-f880-491a-86c5-409c518678d9" xlink:href="lifx-20220630.xsd#lifx_DebtInstrumentConvertibleIfConvertedValueInExcessOfBelowPrincipal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_lifx_DebtInstrumentConvertibleIfConvertedValueInExcessOfBelowPrincipal_20f3b105-f880-491a-86c5-409c518678d9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightOutstanding_b51d316b-c3d1-41fc-a95a-cfc2c4d6b91f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_ClassOfWarrantOrRightOutstanding_b51d316b-c3d1-41fc-a95a-cfc2c4d6b91f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_ad03ab5b-f5ff-4598-b3b6-c7fe10578477" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_ad03ab5b-f5ff-4598-b3b6-c7fe10578477" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstandingTerm_44b833d3-4434-4431-8ef8-bbdddab484d3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WarrantsAndRightsOutstandingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_WarrantsAndRightsOutstandingTerm_44b833d3-4434-4431-8ef8-bbdddab484d3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_WarrantsAndRightsOutstandingRestrictionPeriod_c764fee9-c3a7-4bf9-912a-da229a9a32da" xlink:href="lifx-20220630.xsd#lifx_WarrantsAndRightsOutstandingRestrictionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_lifx_WarrantsAndRightsOutstandingRestrictionPeriod_c764fee9-c3a7-4bf9-912a-da229a9a32da" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_07d63766-e9eb-4920-aceb-8d5a404f2c2f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_07d63766-e9eb-4920-aceb-8d5a404f2c2f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature_1470e110-6539-48cd-8404-5115a2d4df40" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature_1470e110-6539-48cd-8404-5115a2d4df40" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_ec593c8c-ea1a-4c88-8b7c-a085e63bde9f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_InterestExpenseDebt_ec593c8c-ea1a-4c88-8b7c-a085e63bde9f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_685bd17b-274d-46f9-88ac-7794c7559d90" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_564d4789-7e8e-4a5d-bf7f-c67d47376039" xlink:to="loc_us-gaap_DebtInstrumentTable_685bd17b-274d-46f9-88ac-7794c7559d90" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_82f17bb9-71ca-4bc1-b900-315a8f3ecc13" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_685bd17b-274d-46f9-88ac-7794c7559d90" xlink:to="loc_us-gaap_DebtInstrumentAxis_82f17bb9-71ca-4bc1-b900-315a8f3ecc13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_82f17bb9-71ca-4bc1-b900-315a8f3ecc13_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_82f17bb9-71ca-4bc1-b900-315a8f3ecc13" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_82f17bb9-71ca-4bc1-b900-315a8f3ecc13_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_d3c8ad84-9dfb-40f8-9a90-a7ede47f9708" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_82f17bb9-71ca-4bc1-b900-315a8f3ecc13" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_d3c8ad84-9dfb-40f8-9a90-a7ede47f9708" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_July2021ConvertibleNotesMember_22d00330-d680-493f-9f52-b033d5cd4c54" xlink:href="lifx-20220630.xsd#lifx_July2021ConvertibleNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d3c8ad84-9dfb-40f8-9a90-a7ede47f9708" xlink:to="loc_lifx_July2021ConvertibleNotesMember_22d00330-d680-493f-9f52-b033d5cd4c54" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_20cf1a70-93a6-4de2-8fb6-f80b64fcd1a0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_685bd17b-274d-46f9-88ac-7794c7559d90" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_20cf1a70-93a6-4de2-8fb6-f80b64fcd1a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_20cf1a70-93a6-4de2-8fb6-f80b64fcd1a0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_20cf1a70-93a6-4de2-8fb6-f80b64fcd1a0" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_20cf1a70-93a6-4de2-8fb6-f80b64fcd1a0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_3cb63512-ad89-411d-9839-7a5add080718" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_20cf1a70-93a6-4de2-8fb6-f80b64fcd1a0" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_3cb63512-ad89-411d-9839-7a5add080718" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_WarrantTranche1Member_45da8165-000e-44cf-b1db-282939b4b9ef" xlink:href="lifx-20220630.xsd#lifx_WarrantTranche1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_3cb63512-ad89-411d-9839-7a5add080718" xlink:to="loc_lifx_WarrantTranche1Member_45da8165-000e-44cf-b1db-282939b4b9ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_WarrantTranche2Member_7353b20f-c52b-4eec-a2f1-78def74fa5b1" xlink:href="lifx-20220630.xsd#lifx_WarrantTranche2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_3cb63512-ad89-411d-9839-7a5add080718" xlink:to="loc_lifx_WarrantTranche2Member_7353b20f-c52b-4eec-a2f1-78def74fa5b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_WarrantTranche3Member_a6405547-3cf6-4893-b95e-06efb81bfc05" xlink:href="lifx-20220630.xsd#lifx_WarrantTranche3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_3cb63512-ad89-411d-9839-7a5add080718" xlink:to="loc_lifx_WarrantTranche3Member_a6405547-3cf6-4893-b95e-06efb81bfc05" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/ConvertibleNotesFairValueAssumptionsDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#ConvertibleNotesFairValueAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/ConvertibleNotesFairValueAssumptionsDetails" xlink:type="extended" id="i3abd55ad479444728333ccfc253c0c6f_ConvertibleNotesFairValueAssumptionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_3aa88a80-b6da-496c-afad-75245908669e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstandingMeasurementInput_b7f609b3-c3a3-4355-989b-5b2d237a928d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WarrantsAndRightsOutstandingMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_3aa88a80-b6da-496c-afad-75245908669e" xlink:to="loc_us-gaap_WarrantsAndRightsOutstandingMeasurementInput_b7f609b3-c3a3-4355-989b-5b2d237a928d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstandingTerm_d92c0e72-7cad-4036-a6c5-af13bb1cb145" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WarrantsAndRightsOutstandingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_3aa88a80-b6da-496c-afad-75245908669e" xlink:to="loc_us-gaap_WarrantsAndRightsOutstandingTerm_d92c0e72-7cad-4036-a6c5-af13bb1cb145" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_f4c238cf-0019-4d45-aa1d-716aea0fcb61" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_3aa88a80-b6da-496c-afad-75245908669e" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_f4c238cf-0019-4d45-aa1d-716aea0fcb61" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_157dd3b8-5649-4014-a7f9-cbc9b1775d3d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_f4c238cf-0019-4d45-aa1d-716aea0fcb61" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_157dd3b8-5649-4014-a7f9-cbc9b1775d3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_157dd3b8-5649-4014-a7f9-cbc9b1775d3d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_157dd3b8-5649-4014-a7f9-cbc9b1775d3d" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_157dd3b8-5649-4014-a7f9-cbc9b1775d3d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_427eff7e-1ec2-48d6-9c60-708d4445e71d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_157dd3b8-5649-4014-a7f9-cbc9b1775d3d" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_427eff7e-1ec2-48d6-9c60-708d4445e71d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_WarrantTranche1Member_551e3b3c-f14c-4b74-9cd0-ec6836c9c87c" xlink:href="lifx-20220630.xsd#lifx_WarrantTranche1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_427eff7e-1ec2-48d6-9c60-708d4445e71d" xlink:to="loc_lifx_WarrantTranche1Member_551e3b3c-f14c-4b74-9cd0-ec6836c9c87c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_WarrantTranche2Member_53cd6410-fbc3-48c0-8dae-a1753e077261" xlink:href="lifx-20220630.xsd#lifx_WarrantTranche2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_427eff7e-1ec2-48d6-9c60-708d4445e71d" xlink:to="loc_lifx_WarrantTranche2Member_53cd6410-fbc3-48c0-8dae-a1753e077261" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_WarrantTranche3Member_c7187bd4-3980-4612-9537-046ddec22faf" xlink:href="lifx-20220630.xsd#lifx_WarrantTranche3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_427eff7e-1ec2-48d6-9c60-708d4445e71d" xlink:to="loc_lifx_WarrantTranche3Member_c7187bd4-3980-4612-9537-046ddec22faf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_ec0fdc2f-3ad0-4fd6-9df7-5a8ad5705f5e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_f4c238cf-0019-4d45-aa1d-716aea0fcb61" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_ec0fdc2f-3ad0-4fd6-9df7-5a8ad5705f5e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_ec0fdc2f-3ad0-4fd6-9df7-5a8ad5705f5e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_ec0fdc2f-3ad0-4fd6-9df7-5a8ad5705f5e" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_ec0fdc2f-3ad0-4fd6-9df7-5a8ad5705f5e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_639f953c-be29-434a-a971-da7088a3abbc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_ec0fdc2f-3ad0-4fd6-9df7-5a8ad5705f5e" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_639f953c-be29-434a-a971-da7088a3abbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputSharePriceMember_f9ef519a-00fb-45c5-ae95-8f5d75a62cef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputSharePriceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_639f953c-be29-434a-a971-da7088a3abbc" xlink:to="loc_us-gaap_MeasurementInputSharePriceMember_f9ef519a-00fb-45c5-ae95-8f5d75a62cef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputExpectedDividendRateMember_0c315e9f-6777-4c05-aedb-53096a87a39b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputExpectedDividendRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_639f953c-be29-434a-a971-da7088a3abbc" xlink:to="loc_us-gaap_MeasurementInputExpectedDividendRateMember_0c315e9f-6777-4c05-aedb-53096a87a39b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_398f36e5-b384-44be-ba70-d144e39f9e11" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_639f953c-be29-434a-a971-da7088a3abbc" xlink:to="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_398f36e5-b384-44be-ba70-d144e39f9e11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputPriceVolatilityMember_a87366a2-708c-413b-9100-5b8ec8547c47" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MeasurementInputPriceVolatilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_639f953c-be29-434a-a971-da7088a3abbc" xlink:to="loc_us-gaap_MeasurementInputPriceVolatilityMember_a87366a2-708c-413b-9100-5b8ec8547c47" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/ConvertibleNotesCurrentandNonCurrentDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#ConvertibleNotesCurrentandNonCurrentDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/ConvertibleNotesCurrentandNonCurrentDetails" xlink:type="extended" id="i26d00ac2909a47118956b3cdfdf5d3d0_ConvertibleNotesCurrentandNonCurrentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_aa64364a-9f05-4b7f-bbfa-da20ac8835b4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtCurrent_886b42bd-8ccf-417d-b599-ab2ae2186f90" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_aa64364a-9f05-4b7f-bbfa-da20ac8835b4" xlink:to="loc_us-gaap_ConvertibleDebtCurrent_886b42bd-8ccf-417d-b599-ab2ae2186f90" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtNoncurrent_096f9b7d-0efd-4c5a-abf1-cb0b612f30eb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_aa64364a-9f05-4b7f-bbfa-da20ac8835b4" xlink:to="loc_us-gaap_ConvertibleDebtNoncurrent_096f9b7d-0efd-4c5a-abf1-cb0b612f30eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebt_2090bb71-89c0-4f46-bd8b-061691f8e9b5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_aa64364a-9f05-4b7f-bbfa-da20ac8835b4" xlink:to="loc_us-gaap_ConvertibleDebt_2090bb71-89c0-4f46-bd8b-061691f8e9b5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_87a15c70-fbd5-497a-b4f4-da5e65568fb4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_aa64364a-9f05-4b7f-bbfa-da20ac8835b4" xlink:to="loc_us-gaap_DebtInstrumentTable_87a15c70-fbd5-497a-b4f4-da5e65568fb4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_be17653a-fae4-4f56-8951-a1afe4c9bce6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_87a15c70-fbd5-497a-b4f4-da5e65568fb4" xlink:to="loc_us-gaap_DebtInstrumentAxis_be17653a-fae4-4f56-8951-a1afe4c9bce6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_be17653a-fae4-4f56-8951-a1afe4c9bce6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_be17653a-fae4-4f56-8951-a1afe4c9bce6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_be17653a-fae4-4f56-8951-a1afe4c9bce6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_9ea0e7c7-7afc-4f3e-a558-a97dcb455c7c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_be17653a-fae4-4f56-8951-a1afe4c9bce6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_9ea0e7c7-7afc-4f3e-a558-a97dcb455c7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_July2021ConvertibleNotesMember_6268aee3-58ac-405b-9b5f-66c1c5858d46" xlink:href="lifx-20220630.xsd#lifx_July2021ConvertibleNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9ea0e7c7-7afc-4f3e-a558-a97dcb455c7c" xlink:to="loc_lifx_July2021ConvertibleNotesMember_6268aee3-58ac-405b-9b5f-66c1c5858d46" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_September2021ConvertibleNotesMember_7602469b-3da2-4ab2-9836-25bcbf530eea" xlink:href="lifx-20220630.xsd#lifx_September2021ConvertibleNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9ea0e7c7-7afc-4f3e-a558-a97dcb455c7c" xlink:to="loc_lifx_September2021ConvertibleNotesMember_7602469b-3da2-4ab2-9836-25bcbf530eea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ConvertibleDebtRevestingNotesMember_48a5c833-cf6e-4255-a1e0-dda4dbc6b442" xlink:href="lifx-20220630.xsd#lifx_ConvertibleDebtRevestingNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9ea0e7c7-7afc-4f3e-a558-a97dcb455c7c" xlink:to="loc_lifx_ConvertibleDebtRevestingNotesMember_48a5c833-cf6e-4255-a1e0-dda4dbc6b442" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/CommonStockSharesReservedforIssuanceDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#CommonStockSharesReservedforIssuanceDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/CommonStockSharesReservedforIssuanceDetails" xlink:type="extended" id="i0fedf8bf08d747f0adea58e87c23ed50_CommonStockSharesReservedforIssuanceDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_f6253dd8-c57d-4309-b6c9-1a3225907beb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_1b5303f4-e522-4286-bd02-2755e6ed530c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_f6253dd8-c57d-4309-b6c9-1a3225907beb" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_1b5303f4-e522-4286-bd02-2755e6ed530c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_023e7b10-60c6-4a0f-acd7-5f9dd5527c72" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_f6253dd8-c57d-4309-b6c9-1a3225907beb" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_023e7b10-60c6-4a0f-acd7-5f9dd5527c72" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_f9d438e9-544c-45c7-90e8-740d9bb0e068" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_023e7b10-60c6-4a0f-acd7-5f9dd5527c72" xlink:to="loc_us-gaap_StatementClassOfStockAxis_f9d438e9-544c-45c7-90e8-740d9bb0e068" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_f9d438e9-544c-45c7-90e8-740d9bb0e068_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_f9d438e9-544c-45c7-90e8-740d9bb0e068" xlink:to="loc_us-gaap_ClassOfStockDomain_f9d438e9-544c-45c7-90e8-740d9bb0e068_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_db771a47-f6ea-4acb-96af-78f52fef0842" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_f9d438e9-544c-45c7-90e8-740d9bb0e068" xlink:to="loc_us-gaap_ClassOfStockDomain_db771a47-f6ea-4acb-96af-78f52fef0842" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockCompensationPlanMember_86a978b2-4261-451b-829c-763c7af5ac07" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_db771a47-f6ea-4acb-96af-78f52fef0842" xlink:to="loc_us-gaap_StockCompensationPlanMember_86a978b2-4261-451b-829c-763c7af5ac07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_6626dda4-616f-48ea-ae35-7228df900549" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_db771a47-f6ea-4acb-96af-78f52fef0842" xlink:to="loc_us-gaap_WarrantMember_6626dda4-616f-48ea-ae35-7228df900549" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_29f01a02-449d-42e8-801b-63297e264292" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_db771a47-f6ea-4acb-96af-78f52fef0842" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_29f01a02-449d-42e8-801b-63297e264292" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_8fab4d32-2eb2-49d6-9d65-fe93d200d50a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_db771a47-f6ea-4acb-96af-78f52fef0842" xlink:to="loc_us-gaap_ConvertibleDebtMember_8fab4d32-2eb2-49d6-9d65-fe93d200d50a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_SharesToBeGrantedMember_cc1feae0-c431-4148-841b-ed23caa4e547" xlink:href="lifx-20220630.xsd#lifx_SharesToBeGrantedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_db771a47-f6ea-4acb-96af-78f52fef0842" xlink:to="loc_lifx_SharesToBeGrantedMember_cc1feae0-c431-4148-841b-ed23caa4e547" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/WarrantsDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#WarrantsDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/WarrantsDetails" xlink:type="extended" id="i4485451ed2184e61b2dafd32d4338c39_WarrantsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightLineItems_24dea92f-3faa-471a-82ee-a84452e54787" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_2692301c-3ad7-4fa5-b0e9-2595763b792b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_24dea92f-3faa-471a-82ee-a84452e54787" xlink:to="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_2692301c-3ad7-4fa5-b0e9-2595763b792b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_13b39c3e-8f69-4a1b-8e99-9566df48df62" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_24dea92f-3faa-471a-82ee-a84452e54787" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_13b39c3e-8f69-4a1b-8e99-9566df48df62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightTable_7076f777-ddbc-40af-8943-fa5fd8ab4055" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfWarrantOrRightTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_24dea92f-3faa-471a-82ee-a84452e54787" xlink:to="loc_us-gaap_ClassOfWarrantOrRightTable_7076f777-ddbc-40af-8943-fa5fd8ab4055" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_039da561-0db0-4e4c-9343-82b4e44bc291" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_7076f777-ddbc-40af-8943-fa5fd8ab4055" xlink:to="loc_srt_RangeAxis_039da561-0db0-4e4c-9343-82b4e44bc291" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_039da561-0db0-4e4c-9343-82b4e44bc291_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_039da561-0db0-4e4c-9343-82b4e44bc291" xlink:to="loc_srt_RangeMember_039da561-0db0-4e4c-9343-82b4e44bc291_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_db1f2d3f-b17e-4d66-a766-2de6ecae3af3" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_039da561-0db0-4e4c-9343-82b4e44bc291" xlink:to="loc_srt_RangeMember_db1f2d3f-b17e-4d66-a766-2de6ecae3af3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_45cd01d2-fbc2-4c0a-9637-ae44bb82cd62" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_db1f2d3f-b17e-4d66-a766-2de6ecae3af3" xlink:to="loc_srt_MinimumMember_45cd01d2-fbc2-4c0a-9637-ae44bb82cd62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_fd891cc8-86d9-4ef1-a702-3407f28cb2aa" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_db1f2d3f-b17e-4d66-a766-2de6ecae3af3" xlink:to="loc_srt_MaximumMember_fd891cc8-86d9-4ef1-a702-3407f28cb2aa" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/EquityIncentivePlanNarrativeDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#EquityIncentivePlanNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/EquityIncentivePlanNarrativeDetails" xlink:type="extended" id="i4d55e49687d1407daa6a2a685040aff8_EquityIncentivePlanNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValuePercentage_c5b49305-5f28-48a9-be94-db904cd2d7f0" xlink:href="lifx-20220630.xsd#lifx_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValuePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_lifx_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValuePercentage_c5b49305-5f28-48a9-be94-db904cd2d7f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_474b1190-d049-433f-b95f-ab0be9b09ce7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_474b1190-d049-433f-b95f-ab0be9b09ce7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_dbf0f4ed-936b-4b72-9bb8-65c882aa038d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_dbf0f4ed-936b-4b72-9bb8-65c882aa038d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_27e8b030-4d7a-4ada-b5fa-6f08d95f175b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_27e8b030-4d7a-4ada-b5fa-6f08d95f175b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_59155dc5-74e6-4b3f-88e5-0b36579fe2c6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_59155dc5-74e6-4b3f-88e5-0b36579fe2c6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_d421a3c4-9c33-479e-9ae0-f1a300ca6fe5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_d421a3c4-9c33-479e-9ae0-f1a300ca6fe5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsIntrinsicValue_e8de1417-6670-4f2d-9f10-fc113f941036" xlink:href="lifx-20220630.xsd#lifx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_lifx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsIntrinsicValue_e8de1417-6670-4f2d-9f10-fc113f941036" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationRevestingStockShares_40c73906-14e1-483b-8845-c4b57cd4c09c" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationRevestingStockShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationRevestingStockShares_40c73906-14e1-483b-8845-c4b57cd4c09c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationRevestingStock_aa7b9fd6-c4d7-4f71-8d4a-726b66998b4c" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationRevestingStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationRevestingStock_aa7b9fd6-c4d7-4f71-8d4a-726b66998b4c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_a12ddbb0-70dd-401c-b5ec-b29dc53530a2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_a12ddbb0-70dd-401c-b5ec-b29dc53530a2" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_40493dfb-8cf8-4e5a-993b-9b0e1b4b25bb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_40493dfb-8cf8-4e5a-993b-9b0e1b4b25bb" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationShareBasedCompensationShares_aa1c7de6-bd7b-48db-ae39-b46a20099c79" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationShareBasedCompensationShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationShareBasedCompensationShares_aa1c7de6-bd7b-48db-ae39-b46a20099c79" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationShareBasedCompensation_8a9940e5-e27c-4718-a083-f04ff96cdc04" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationShareBasedCompensation_8a9940e5-e27c-4718-a083-f04ff96cdc04" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_04515d09-6082-40b3-b2a9-8db90e52d731" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_04515d09-6082-40b3-b2a9-8db90e52d731" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_8e5055dc-1ff2-42d9-8a75-b4b02c9f8f01" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_8e5055dc-1ff2-42d9-8a75-b4b02c9f8f01" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationExcludedConsiderationSharesGranted_bbf99565-be69-47ee-b825-e159caa2c515" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationExcludedConsiderationSharesGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_lifx_BusinessCombinationExcludedConsiderationSharesGranted_bbf99565-be69-47ee-b825-e159caa2c515" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationConsiderationAndBonusesShares_2b05b1a9-0abd-45fd-8b34-7c8a7c26d57a" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationConsiderationAndBonusesShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_lifx_BusinessCombinationConsiderationAndBonusesShares_2b05b1a9-0abd-45fd-8b34-7c8a7c26d57a" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationConsiderationAndBonuses_0039f0fc-3305-4afd-b2d4-9e7b7ed471f0" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationConsiderationAndBonuses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_lifx_BusinessCombinationConsiderationAndBonuses_0039f0fc-3305-4afd-b2d4-9e7b7ed471f0" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodFairValue_960c3e35-ea10-4d52-9744-452003263c4e" xlink:href="lifx-20220630.xsd#lifx_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_lifx_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodFairValue_960c3e35-ea10-4d52-9744-452003263c4e" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_2531ee46-c27a-4005-a12c-d043f15f615b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_2531ee46-c27a-4005-a12c-d043f15f615b" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationIndemnityEscrowShares_e5d7dd95-01a8-46e4-9647-b7eec7cf2a61" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationIndemnityEscrowShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_lifx_BusinessCombinationIndemnityEscrowShares_e5d7dd95-01a8-46e4-9647-b7eec7cf2a61" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_BusinessCombinationIndemnityEscrowTerm_634c9e19-3cfe-48a2-bd17-ee32733611cc" xlink:href="lifx-20220630.xsd#lifx_BusinessCombinationIndemnityEscrowTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_lifx_BusinessCombinationIndemnityEscrowTerm_634c9e19-3cfe-48a2-bd17-ee32733611cc" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_4088d6e8-cba2-462b-83e5-7a78e0893640" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_4088d6e8-cba2-462b-83e5-7a78e0893640" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ae3d94a5-5c5e-4824-828c-bb74a533432e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bc272860-88bb-45da-9e9c-0fee63910895" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ae3d94a5-5c5e-4824-828c-bb74a533432e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_003a8483-98e5-4b50-90b8-f08237f13546" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ae3d94a5-5c5e-4824-828c-bb74a533432e" xlink:to="loc_us-gaap_AwardTypeAxis_003a8483-98e5-4b50-90b8-f08237f13546" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_003a8483-98e5-4b50-90b8-f08237f13546_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_003a8483-98e5-4b50-90b8-f08237f13546" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_003a8483-98e5-4b50-90b8-f08237f13546_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ec790f5-3228-46f9-b7ff-f1872bd3d86e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_003a8483-98e5-4b50-90b8-f08237f13546" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ec790f5-3228-46f9-b7ff-f1872bd3d86e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_b0f57b49-62f2-4c9f-b240-9e87698cf5e7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ec790f5-3228-46f9-b7ff-f1872bd3d86e" xlink:to="loc_us-gaap_EmployeeStockOptionMember_b0f57b49-62f2-4c9f-b240-9e87698cf5e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_TerminatedStockOptionMember_f1529c3f-d6f7-406f-a9c0-ca7c6a163de7" xlink:href="lifx-20220630.xsd#lifx_TerminatedStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeStockOptionMember_b0f57b49-62f2-4c9f-b240-9e87698cf5e7" xlink:to="loc_lifx_TerminatedStockOptionMember_f1529c3f-d6f7-406f-a9c0-ca7c6a163de7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_f1afc648-017e-4ad1-95c4-11647b3d3839" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ec790f5-3228-46f9-b7ff-f1872bd3d86e" xlink:to="loc_us-gaap_RestrictedStockMember_f1afc648-017e-4ad1-95c4-11647b3d3839" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_9084c1ee-32dd-4791-9e1c-7e37fe4d4270" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ec790f5-3228-46f9-b7ff-f1872bd3d86e" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_9084c1ee-32dd-4791-9e1c-7e37fe4d4270" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_bdecd5f5-5495-4dd7-90bb-fb812cf01651" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ec790f5-3228-46f9-b7ff-f1872bd3d86e" xlink:to="loc_us-gaap_PerformanceSharesMember_bdecd5f5-5495-4dd7-90bb-fb812cf01651" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_02695a2d-85fd-4fa1-979e-5881811fb492" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ae3d94a5-5c5e-4824-828c-bb74a533432e" xlink:to="loc_srt_TitleOfIndividualAxis_02695a2d-85fd-4fa1-979e-5881811fb492" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_02695a2d-85fd-4fa1-979e-5881811fb492_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_02695a2d-85fd-4fa1-979e-5881811fb492" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_02695a2d-85fd-4fa1-979e-5881811fb492_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_36bf4b1d-8b1b-48f4-8e6a-4af12ffbf952" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_02695a2d-85fd-4fa1-979e-5881811fb492" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_36bf4b1d-8b1b-48f4-8e6a-4af12ffbf952" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_A10StockholderMember_92897cbf-a309-40bf-8bec-0eefab907345" xlink:href="lifx-20220630.xsd#lifx_A10StockholderMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_36bf4b1d-8b1b-48f4-8e6a-4af12ffbf952" xlink:to="loc_lifx_A10StockholderMember_92897cbf-a309-40bf-8bec-0eefab907345" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_8954f2c8-ad56-4775-aa15-460dbfc63729" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ae3d94a5-5c5e-4824-828c-bb74a533432e" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_8954f2c8-ad56-4775-aa15-460dbfc63729" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8954f2c8-ad56-4775-aa15-460dbfc63729_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_8954f2c8-ad56-4775-aa15-460dbfc63729" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8954f2c8-ad56-4775-aa15-460dbfc63729_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_abd88779-484e-45a4-bd39-a102df8a0cc1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_8954f2c8-ad56-4775-aa15-460dbfc63729" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_abd88779-484e-45a4-bd39-a102df8a0cc1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_JiobitMember_f76d22c3-425b-4ba6-93e8-97d3bdac949e" xlink:href="lifx-20220630.xsd#lifx_JiobitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_abd88779-484e-45a4-bd39-a102df8a0cc1" xlink:to="loc_lifx_JiobitMember_f76d22c3-425b-4ba6-93e8-97d3bdac949e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_TileIncMember_8e7a2e4b-0e64-4243-8b15-afe91f715d38" xlink:href="lifx-20220630.xsd#lifx_TileIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_abd88779-484e-45a4-bd39-a102df8a0cc1" xlink:to="loc_lifx_TileIncMember_8e7a2e4b-0e64-4243-8b15-afe91f715d38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_96cb5b94-a360-4c7a-a98c-bb320e73a49f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ae3d94a5-5c5e-4824-828c-bb74a533432e" xlink:to="loc_srt_RangeAxis_96cb5b94-a360-4c7a-a98c-bb320e73a49f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_96cb5b94-a360-4c7a-a98c-bb320e73a49f_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_96cb5b94-a360-4c7a-a98c-bb320e73a49f" xlink:to="loc_srt_RangeMember_96cb5b94-a360-4c7a-a98c-bb320e73a49f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_846792fe-6e0d-455f-9593-635aea5314ce" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_96cb5b94-a360-4c7a-a98c-bb320e73a49f" xlink:to="loc_srt_RangeMember_846792fe-6e0d-455f-9593-635aea5314ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_11292fcd-61a8-4c48-a3c9-cc61e93854c0" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_846792fe-6e0d-455f-9593-635aea5314ce" xlink:to="loc_srt_MinimumMember_11292fcd-61a8-4c48-a3c9-cc61e93854c0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_d30a210a-a6fc-4708-931c-027db6994ffc" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_846792fe-6e0d-455f-9593-635aea5314ce" xlink:to="loc_srt_MaximumMember_d30a210a-a6fc-4708-931c-027db6994ffc" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/EquityIncentivePlanRestrictedStockUnitsActivityDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#EquityIncentivePlanRestrictedStockUnitsActivityDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/EquityIncentivePlanRestrictedStockUnitsActivityDetails" xlink:type="extended" id="iae943750ee6f40d69afae44a204c94aa_EquityIncentivePlanRestrictedStockUnitsActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9bc18ba1-7cbf-423a-a4f7-6c6d228dd8c7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7cb48f0c-0c64-4e99-82b8-7349adfbdf98" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9bc18ba1-7cbf-423a-a4f7-6c6d228dd8c7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7cb48f0c-0c64-4e99-82b8-7349adfbdf98" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_97f59fac-20d9-4d52-a47c-a78a823f0ad9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7cb48f0c-0c64-4e99-82b8-7349adfbdf98" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_97f59fac-20d9-4d52-a47c-a78a823f0ad9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_7da2ee99-10a8-41b2-ae83-1bf46613773f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7cb48f0c-0c64-4e99-82b8-7349adfbdf98" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_7da2ee99-10a8-41b2-ae83-1bf46613773f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_a4869347-ac7d-475a-a7a1-f67f6e1a9e1f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7cb48f0c-0c64-4e99-82b8-7349adfbdf98" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_a4869347-ac7d-475a-a7a1-f67f6e1a9e1f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_cb0baa74-4581-42cd-ba6f-404ff6f7eb38" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7cb48f0c-0c64-4e99-82b8-7349adfbdf98" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_cb0baa74-4581-42cd-ba6f-404ff6f7eb38" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_508274a8-6ee4-4dfb-8914-65bf091dfd12" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_7498c9ef-a4d3-4e57-a57a-d3820a775806" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9bc18ba1-7cbf-423a-a4f7-6c6d228dd8c7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_7498c9ef-a4d3-4e57-a57a-d3820a775806" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_b37ad476-5456-4f80-b417-8d789fce51ab" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_7498c9ef-a4d3-4e57-a57a-d3820a775806" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_b37ad476-5456-4f80-b417-8d789fce51ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_d9722464-f575-40d1-a5f0-7feecc9ac80b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_7498c9ef-a4d3-4e57-a57a-d3820a775806" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_d9722464-f575-40d1-a5f0-7feecc9ac80b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_4867cec9-1661-4927-9d52-c087fce47534" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_7498c9ef-a4d3-4e57-a57a-d3820a775806" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_4867cec9-1661-4927-9d52-c087fce47534" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_c4abf052-7908-4323-8ef3-f0ec8228b88c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_7498c9ef-a4d3-4e57-a57a-d3820a775806" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_c4abf052-7908-4323-8ef3-f0ec8228b88c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_b2cc6eef-49c8-4b91-9aa3-f3ed0edea5fb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_59813b87-7508-4e4c-bf65-f358fcf06273" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9bc18ba1-7cbf-423a-a4f7-6c6d228dd8c7" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_59813b87-7508-4e4c-bf65-f358fcf06273" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_0f80c0eb-f795-45f6-bcf0-eb53bfbf8449" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_59813b87-7508-4e4c-bf65-f358fcf06273" xlink:to="loc_us-gaap_AwardTypeAxis_0f80c0eb-f795-45f6-bcf0-eb53bfbf8449" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0f80c0eb-f795-45f6-bcf0-eb53bfbf8449_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_0f80c0eb-f795-45f6-bcf0-eb53bfbf8449" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0f80c0eb-f795-45f6-bcf0-eb53bfbf8449_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ef625f38-f2a5-4bcb-a858-330660cdfaa3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_0f80c0eb-f795-45f6-bcf0-eb53bfbf8449" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ef625f38-f2a5-4bcb-a858-330660cdfaa3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_a702c033-b51b-4932-a164-02c886123db0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ef625f38-f2a5-4bcb-a858-330660cdfaa3" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_a702c033-b51b-4932-a164-02c886123db0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/EquityIncentivePlanFairValueAssumptionsDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#EquityIncentivePlanFairValueAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/EquityIncentivePlanFairValueAssumptionsDetails" xlink:type="extended" id="i198117b52f944f2bbcf5c540a5904934_EquityIncentivePlanFairValueAssumptionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea0f42fd-b10e-427e-867e-5f9f42e395d8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_862d45ca-5c3e-415f-888f-4d9244b37942" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea0f42fd-b10e-427e-867e-5f9f42e395d8" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_862d45ca-5c3e-415f-888f-4d9244b37942" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_43d93bdb-a74e-4466-bb1c-951abeca8f2b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea0f42fd-b10e-427e-867e-5f9f42e395d8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_43d93bdb-a74e-4466-bb1c-951abeca8f2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_ec2cd44d-bfa4-4350-b325-95c8d4af2025" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea0f42fd-b10e-427e-867e-5f9f42e395d8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_ec2cd44d-bfa4-4350-b325-95c8d4af2025" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_9659a416-122f-43a4-8c90-ec157c13fc55" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea0f42fd-b10e-427e-867e-5f9f42e395d8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_9659a416-122f-43a4-8c90-ec157c13fc55" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_132a3b81-76f6-4cc9-8612-0784cc990365" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea0f42fd-b10e-427e-867e-5f9f42e395d8" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_132a3b81-76f6-4cc9-8612-0784cc990365" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_b0fa55c9-e5fa-4beb-b15d-8f03f070bec4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_132a3b81-76f6-4cc9-8612-0784cc990365" xlink:to="loc_us-gaap_AwardTypeAxis_b0fa55c9-e5fa-4beb-b15d-8f03f070bec4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b0fa55c9-e5fa-4beb-b15d-8f03f070bec4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_b0fa55c9-e5fa-4beb-b15d-8f03f070bec4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b0fa55c9-e5fa-4beb-b15d-8f03f070bec4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_71bbedc6-99e6-4e61-b6e3-d212e8b8df5f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_b0fa55c9-e5fa-4beb-b15d-8f03f070bec4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_71bbedc6-99e6-4e61-b6e3-d212e8b8df5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_174fdb9d-2885-47a9-9505-9630295ae97b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_71bbedc6-99e6-4e61-b6e3-d212e8b8df5f" xlink:to="loc_us-gaap_EmployeeStockOptionMember_174fdb9d-2885-47a9-9505-9630295ae97b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/EquityIncentivePlanStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#EquityIncentivePlanStockBasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/EquityIncentivePlanStockBasedCompensationExpenseDetails" xlink:type="extended" id="i7d161143aa614f6a8d96846ebc628bb4_EquityIncentivePlanStockBasedCompensationExpenseDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_5a6102d5-f26a-462e-9d5b-49dd4b972260" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_d27c3bb8-ace0-48a1-8b9a-fbcaf5831eee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_5a6102d5-f26a-462e-9d5b-49dd4b972260" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_d27c3bb8-ace0-48a1-8b9a-fbcaf5831eee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_4d1d0d22-4a93-4e5c-9a2d-31373a488ef1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_5a6102d5-f26a-462e-9d5b-49dd4b972260" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_4d1d0d22-4a93-4e5c-9a2d-31373a488ef1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_57e56d54-a481-4f74-8589-5a622fbbd190" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_4d1d0d22-4a93-4e5c-9a2d-31373a488ef1" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_57e56d54-a481-4f74-8589-5a622fbbd190" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_57e56d54-a481-4f74-8589-5a622fbbd190_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_57e56d54-a481-4f74-8589-5a622fbbd190" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_57e56d54-a481-4f74-8589-5a622fbbd190_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_68652b5e-4da4-4b60-a408-c3cce6b139b9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_57e56d54-a481-4f74-8589-5a622fbbd190" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_68652b5e-4da4-4b60-a408-c3cce6b139b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_eb6ecdf4-7107-4045-902e-f2d0a41522f5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_68652b5e-4da4-4b60-a408-c3cce6b139b9" xlink:to="loc_us-gaap_CostOfSalesMember_eb6ecdf4-7107-4045-902e-f2d0a41522f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_070f2c0c-7388-46e1-8d28-5a25c2fb24ef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_68652b5e-4da4-4b60-a408-c3cce6b139b9" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_070f2c0c-7388-46e1-8d28-5a25c2fb24ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_fa469630-167f-4a31-8831-31bae8a3e77c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SellingAndMarketingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_68652b5e-4da4-4b60-a408-c3cce6b139b9" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_fa469630-167f-4a31-8831-31bae8a3e77c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_01a9aab3-138e-439d-8ee4-f5d15f188334" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GeneralAndAdministrativeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_68652b5e-4da4-4b60-a408-c3cce6b139b9" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_01a9aab3-138e-439d-8ee4-f5d15f188334" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_3ed36dc8-2609-4682-885b-343112743da9" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_4d1d0d22-4a93-4e5c-9a2d-31373a488ef1" xlink:to="loc_srt_ProductOrServiceAxis_3ed36dc8-2609-4682-885b-343112743da9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_3ed36dc8-2609-4682-885b-343112743da9_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_3ed36dc8-2609-4682-885b-343112743da9" xlink:to="loc_srt_ProductsAndServicesDomain_3ed36dc8-2609-4682-885b-343112743da9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_8ec13388-2f73-4015-97bd-6edd07626ad5" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_3ed36dc8-2609-4682-885b-343112743da9" xlink:to="loc_srt_ProductsAndServicesDomain_8ec13388-2f73-4015-97bd-6edd07626ad5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubscriptionAndCirculationMember_0bb67888-2f78-4cf8-8454-2714cb07d457" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubscriptionAndCirculationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_8ec13388-2f73-4015-97bd-6edd07626ad5" xlink:to="loc_us-gaap_SubscriptionAndCirculationMember_0bb67888-2f78-4cf8-8454-2714cb07d457" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_HardwareMember_7bf94c0f-a4fe-476a-aa98-21eaa1fc3d6b" xlink:href="lifx-20220630.xsd#lifx_HardwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_8ec13388-2f73-4015-97bd-6edd07626ad5" xlink:to="loc_lifx_HardwareMember_7bf94c0f-a4fe-476a-aa98-21eaa1fc3d6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductAndServiceOtherMember_39b6d030-8ed5-4dd9-ae15-8e2d35028d08" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductAndServiceOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_8ec13388-2f73-4015-97bd-6edd07626ad5" xlink:to="loc_us-gaap_ProductAndServiceOtherMember_39b6d030-8ed5-4dd9-ae15-8e2d35028d08" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/RelatedPartyTransactionsDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#RelatedPartyTransactionsDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/RelatedPartyTransactionsDetails" xlink:type="extended" id="i97ff0c656cfd49d3b279ab4fca2455ec_RelatedPartyTransactionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_738bf4cb-502d-4e4d-bb7d-be9d2bcc899a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableRelatedParties_783e76b7-7d20-4a1f-83d2-d728c6347508" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NotesReceivableRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_738bf4cb-502d-4e4d-bb7d-be9d2bcc899a" xlink:to="loc_us-gaap_NotesReceivableRelatedParties_783e76b7-7d20-4a1f-83d2-d728c6347508" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromCollectionOfNotesReceivable_725e549b-ef8d-487b-bef8-67b7a69c4279" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromCollectionOfNotesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_738bf4cb-502d-4e4d-bb7d-be9d2bcc899a" xlink:to="loc_us-gaap_ProceedsFromCollectionOfNotesReceivable_725e549b-ef8d-487b-bef8-67b7a69c4279" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_DepositLiabilities_3d8b2743-6c6d-4e59-9e95-239d34762655" xlink:href="lifx-20220630.xsd#lifx_DepositLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_738bf4cb-502d-4e4d-bb7d-be9d2bcc899a" xlink:to="loc_lifx_DepositLiabilities_3d8b2743-6c6d-4e59-9e95-239d34762655" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_069e83b6-4514-4dfc-8442-84e05b455c10" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_738bf4cb-502d-4e4d-bb7d-be9d2bcc899a" xlink:to="loc_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_069e83b6-4514-4dfc-8442-84e05b455c10" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_78259d69-6fc8-4546-97fb-a6d778be2298" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_738bf4cb-502d-4e4d-bb7d-be9d2bcc899a" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_78259d69-6fc8-4546-97fb-a6d778be2298" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_97396594-fd09-432d-8f94-0228bb881384" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_78259d69-6fc8-4546-97fb-a6d778be2298" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_97396594-fd09-432d-8f94-0228bb881384" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_97396594-fd09-432d-8f94-0228bb881384_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_97396594-fd09-432d-8f94-0228bb881384" xlink:to="loc_us-gaap_RelatedPartyDomain_97396594-fd09-432d-8f94-0228bb881384_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_17c39055-9635-43b6-8d14-eac5ca89c392" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_97396594-fd09-432d-8f94-0228bb881384" xlink:to="loc_us-gaap_RelatedPartyDomain_17c39055-9635-43b6-8d14-eac5ca89c392" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ChiefExecutiveOfficerMember_bbf83a77-81a3-477c-b6f9-60aff556faad" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ChiefExecutiveOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_17c39055-9635-43b6-8d14-eac5ca89c392" xlink:to="loc_srt_ChiefExecutiveOfficerMember_bbf83a77-81a3-477c-b6f9-60aff556faad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_DirectorMember_4dd8a527-a7fb-4845-b577-cec21fb5b035" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_DirectorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_17c39055-9635-43b6-8d14-eac5ca89c392" xlink:to="loc_srt_DirectorMember_4dd8a527-a7fb-4845-b577-cec21fb5b035" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_SpouseOfChiefExecutiveOfficerMember_ec9ab642-770a-4525-8eff-eb4586d74592" xlink:href="lifx-20220630.xsd#lifx_SpouseOfChiefExecutiveOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_17c39055-9635-43b6-8d14-eac5ca89c392" xlink:to="loc_lifx_SpouseOfChiefExecutiveOfficerMember_ec9ab642-770a-4525-8eff-eb4586d74592" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/NetLossPerShareAntidilutiveSharesDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#NetLossPerShareAntidilutiveSharesDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/NetLossPerShareAntidilutiveSharesDetails" xlink:type="extended" id="id75ac476091d49a0a5cf7b15b10accaf_NetLossPerShareAntidilutiveSharesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_47595f65-ef8b-48b2-bf8b-0a50560db59e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_4d5977e7-187e-4e9e-a002-25ef0cf35577" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_47595f65-ef8b-48b2-bf8b-0a50560db59e" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_4d5977e7-187e-4e9e-a002-25ef0cf35577" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_ea65f7e4-2d9b-4563-ac69-92c1587adb36" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_47595f65-ef8b-48b2-bf8b-0a50560db59e" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_ea65f7e4-2d9b-4563-ac69-92c1587adb36" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_e73f850c-e940-494c-9a88-52e96423a1ee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_ea65f7e4-2d9b-4563-ac69-92c1587adb36" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_e73f850c-e940-494c-9a88-52e96423a1ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_e73f850c-e940-494c-9a88-52e96423a1ee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_e73f850c-e940-494c-9a88-52e96423a1ee" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_e73f850c-e940-494c-9a88-52e96423a1ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_1035e579-dcd1-4f43-9d83-141d28fb39aa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_e73f850c-e940-494c-9a88-52e96423a1ee" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_1035e579-dcd1-4f43-9d83-141d28fb39aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockCompensationPlanMember_590a6493-68e6-48e9-8631-3dc75fc3ceae" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_1035e579-dcd1-4f43-9d83-141d28fb39aa" xlink:to="loc_us-gaap_StockCompensationPlanMember_590a6493-68e6-48e9-8631-3dc75fc3ceae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_a0407ea3-20e4-4979-acfb-7f3d62891f00" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_1035e579-dcd1-4f43-9d83-141d28fb39aa" xlink:to="loc_us-gaap_WarrantMember_a0407ea3-20e4-4979-acfb-7f3d62891f00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_39fae3a8-cb7f-4e40-a0d0-6396ea2c2446" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_1035e579-dcd1-4f43-9d83-141d28fb39aa" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_39fae3a8-cb7f-4e40-a0d0-6396ea2c2446" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_60070635-8c5e-42df-ab3f-3dfcfed08d2b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_1035e579-dcd1-4f43-9d83-141d28fb39aa" xlink:to="loc_us-gaap_ConvertibleDebtMember_60070635-8c5e-42df-ab3f-3dfcfed08d2b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lifx_SharesToBeGrantedMember_4b8e96a3-4fa3-4735-b447-ba87232b7482" xlink:href="lifx-20220630.xsd#lifx_SharesToBeGrantedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_1035e579-dcd1-4f43-9d83-141d28fb39aa" xlink:to="loc_lifx_SharesToBeGrantedMember_4b8e96a3-4fa3-4735-b447-ba87232b7482" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lifx.com/role/SubsequentEventsDetails" xlink:type="simple" xlink:href="lifx-20220630.xsd#SubsequentEventsDetails"/>
  <link:definitionLink xlink:role="http://lifx.com/role/SubsequentEventsDetails" xlink:type="extended" id="ibfdd6cd4eb4f498a98d0ab2ccaa08813_SubsequentEventsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_dd16174a-bf2f-4ded-95b9-f6bcbc902a4e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossRelatedToLitigationSettlement_85b6e2d6-1dde-45b5-ae8d-7ef2e450d0a3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GainLossRelatedToLitigationSettlement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_dd16174a-bf2f-4ded-95b9-f6bcbc902a4e" xlink:to="loc_us-gaap_GainLossRelatedToLitigationSettlement_85b6e2d6-1dde-45b5-ae8d-7ef2e450d0a3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_f8069fb0-3b08-4acc-a37c-03a7562a787f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_dd16174a-bf2f-4ded-95b9-f6bcbc902a4e" xlink:to="loc_us-gaap_SubsequentEventTable_f8069fb0-3b08-4acc-a37c-03a7562a787f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_5e58c0fe-3b7b-4699-ab90-b5f7c2bf339b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_f8069fb0-3b08-4acc-a37c-03a7562a787f" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_5e58c0fe-3b7b-4699-ab90-b5f7c2bf339b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_5e58c0fe-3b7b-4699-ab90-b5f7c2bf339b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_5e58c0fe-3b7b-4699-ab90-b5f7c2bf339b" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_5e58c0fe-3b7b-4699-ab90-b5f7c2bf339b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_7bbe7153-7564-434d-83cd-159d42432fa2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_5e58c0fe-3b7b-4699-ab90-b5f7c2bf339b" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_7bbe7153-7564-434d-83cd-159d42432fa2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_35736f25-fe8a-42b2-9a9f-8e5e22104e93" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_7bbe7153-7564-434d-83cd-159d42432fa2" xlink:to="loc_us-gaap_SubsequentEventMember_35736f25-fe8a-42b2-9a9f-8e5e22104e93" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-roles-2022.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
