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1、IESLM-80-08ApprovedMethod:MeasuringLumenMaintenanceofLEDLightSourcesIESLM-80-08IESApprovedMethodforMeasuringLumenMaintenanceofLEDLightSourcesPublicationofthisCommitteereporthasbeenapprovedbyIES.SuggestionsforrevisionshouldbedirectedtoIESPreparedby:TheSubco
2、mmitteeonSolidStateLightSourcesoftheIESNATestingProceduresCommittee--`,```,,,,,,,```,```,,,,,`-`-`,,`,,`,`,,`---IESLM-80-08Copyright2008bytheIlluminatingEngineeringSocietyofNorthAmerica.ApprovedbytheIESBoardofDirectors,September22,2008,asaTransactionoftheI
3、lluminatingEngineeringSocietyofNorthAmerica.Allrightsreserved.Nopartofthispublicationmaybereproducedinanyform,inanyelectronicretrievalsystemorotherwise,withoutpriorwrittenpermissionoftheIES.PublishedbytheIlluminatingEngineeringSocietyofNorthAmerica,120Wall
4、Street,NewYork,NewYork10005.IESStandardsandGuidesaredevelopedthroughcommitteeconsensusandproducedbytheIESOfficeinNewYork.Carefulattentionisgiventostyleandaccuracy.Ifanyerrorsarenotedinthisdocument,pleaseforwardthemtoRitaHarrold,DirectorEducationalandTechni
5、calDevelopment,attheaboveaddressforverificationandcorrection.TheIESwelcomesandurgesfeedbackandcomments.ISBN#978-0-87995-227-3PrintedintheUnitedStatesofAmerica.DISCLAIMERIESpublicationsaredevelopedthroughtheconsensusstandardsdevelopmentprocessapprovedbytheA
6、mericanNationalStandardsInstitute.Thisprocessbringstogethervolunteersrepresentingvariedviewpointsandintereststoachieveconsensusonlightingrecommendations.WhiletheIESadministerstheprocessandestablishespoliciesandprocedurestopromotefairnessinthedevelopmentofc
7、onsensus,itmakesnoguarantyorwarrantyastotheaccuracyorcompletenessofanyinformationpublishedherein.TheIESdisclaimsliabilityforanyinjurytopersonsorpropertyorotherdamagesofanynaturewhatsoever,whetherspecial,indirect,consequentialorcompensatory,directlyorindire
8、ctlyresultingfromthepublication,useof,orrelianceonthisdocumentInissuingandmakingthisdocumentavailable,theIESisnotundertakingtorenderprofessionalorotherservicesfororonbehalfofanypersonorentity.NoristheIESunder
