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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
4 a' S5 E, q0 F. e0 _9 i2 w( sIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements3 B* N# m* c+ ]
of Solid-State Lighting Products
5 N# p6 v9 l9 ?+ H9 l8 PA: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。
( ?7 ` a" r9 o8 a+ n# [* T第二个是 79流明光效测试报告。LM79整灯的吧。
5 N) O0 i3 Q1 D GThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?/ B* m3 S1 Z" W1 j* v6 E
4 F% H4 {% K: t0 V/ ~* m' rL70 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).! X, k e1 v1 G( t3 o
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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.
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& }$ h4 K, c( g( ^. x$ h1 |) PLM80, 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.
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: c, Y9 k) r5 M) r& mLM80 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.
& f1 @, ~% P( F! N. k' MQ:寿命L-70是啥
# E6 Z+ |& [0 U$ Z, [2 m$ x( h( G* MA:维持70%光通量的寿命6 W1 q8 Z! G# r" N) i$ N
Q:谢谢。学到东西了) u8 M! ?% B, s# j
A: 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" I7 j% F, U: k2 v2 k! z
Q:明白了0 o+ C Z Y1 P7 Z4 W. [
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发表于 2018-6-29 10:47:25
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