what is the difference between working lifetime,working time,lifespan

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I search for products in Alibaba, i found something i didn't quite understand,like"working time(hours), working lifetime(hour),lifespan(hour)",

i found the parameters filled in by the merchant are the same,but i know ,there are different things,who can tell me the difference.

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Wow, this is a challenging question   

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it's as broad as it's long.

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not the same meaning  Post time Jun 22,2022 10:01

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Edited by Daisy at Jun 23,2022 05:26 AM

working lifetime means:the duration of sb/st life,working lifetime(hour) means: working time+Unused time. for lightsight on time+Light off time
lifespan: like working lifetime,Whether you use it or not
working time:Accumulated working hours,If the light attenuation is too large,must be changed

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Wow,incredible question

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