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Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
# K: [% b V' L3 ^. ?IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements: x8 \' l8 ?: n' V/ e( ?
of Solid-State Lighting Products! i8 h ^+ k* I) Z/ w& d# I& E& k! h
A:那些认证挺像西班牙AENOR的，第一个里面，CE里面的LVD 跟EMC可能有包括。
; a$ S$ t5 H4 q5 x# \+ J! `/ H- P% a第二个是 79流明光效测试报告。LM79整灯的吧。
$ |* z* m% a, |1 D/ p& w" TThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?
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! c2 p+ h Y7 N9 \7 dL70 is simply a measure of the time taken for a light source to degrade to 70% of its original output. It is usually measured in hours and usually refers to degradation of total light output ie lumens. As in “my new LED L70 is 123hours” (not a good result, must try harder).
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LM79, more properly referred to as “LM-79-08” is a Test Method authored by the Illuminating Engineering Society of North America (IESNA) titled “Approved Method: Electrical and Photometric Measurements of Solid-State Lighting Products”. This essentially defines a set of methodologies for laboratory testing of solid state luminaires and other light sources., n5 N0 x* R5 m0 h
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LM80, more properly referred to as “LM-80-08” is also a Test Method authored by the IESNA. It is titled “Approved Method: Measuring Lumen Maintenance of LED Light Sources”. In contrast to LM79 this defines a test method for long-term life testing of component-level LED devices. R9 k4 o) |- ~# ]" B
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LM80 is not much use on its own and does not of itself define how to extrapolate lab-measured LED lifetime test data to enable future lifetime prediction. That’s where TM21 comes in. Full name “TM-21-11”, titled “Projecting Long Term Lumen Maintenance of LED Light Sources”, TM21 details how to extrapolate short-term LED component test data to predict future performance.0 x$ T- X$ l" d( v- V1 g: K5 ^
Q:寿命L-70是啥5 _+ Z4 L- M0 ?4 w' j4 l
A:维持70%光通量的寿命
9 ^5 O$ p- D) _* x$ ~Q:谢谢。学到东西了
& X7 s% {. F. E1 fA: 你这个要的就是一个IES报告，LM79测试报告里面就有，还有IEC里面的60598的测试报告，还有LM80报告，这个报告里面包含了TM21报告的
! s. K' @- J- q+ ?+ q' V& E. rQ:明白了: K, K( v# Q9 |) F
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发表于 2018-6-29 10:47:25
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