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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
- h1 b; y: L- ~( S" m( ~- k1 nIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements) ~$ s, c: ]4 s2 m/ |. b
of Solid-State Lighting Products2 I# Q" F; F: ]# B; g
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。
, M1 \8 L) f! ^ ~3 _第二个是 79流明光效测试报告。LM79整灯的吧。
1 L. I4 c( T0 v3 t, M. }; rThe 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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4 y' y% y* m$ {! a8 TL70 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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% o7 Y% z1 F6 h% ~& M% tLM79, 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.1 ^6 t/ w0 d. p% G, h2 T
* F1 K8 }# {9 a+ @6 z$ N8 L5 [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.
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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.
/ c/ b* Y9 t3 L, m; v, [1 OQ:寿命L-70是啥
: v# R9 m+ [9 n/ Q8 g9 [% rA:维持70%光通量的寿命
* y/ r0 \: h5 ? W" K3 }Q:谢谢。学到东西了
+ }' {$ v7 n! M5 mA: 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
- P0 Z# x x: S* y/ e3 NQ:明白了
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发表于 2018-6-29 10:47:25
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