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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
* D; m0 L! P, E. e/ lIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
" b( A1 c: D6 A! e! ^. M1 bof Solid-State Lighting Products6 P- @. A* u: Z' R2 U" ^
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。/ B7 v# g) }3 \6 ?. U
第二个是 79流明光效测试报告。LM79整灯的吧。
, A6 k7 q# j3 q: S: f1 P vThe 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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L70 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).4 G( Q6 B2 S- A
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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.% [2 c2 V2 r2 \! M: t
3 }$ o8 j# f5 A+ V+ V) E0 P. nLM80, 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.
e W9 m) \ F' }) P( q) ]Q:寿命L-70是啥
2 n" B6 z, D4 j2 e/ n- j; R' {A:维持70%光通量的寿命2 D) ^* V1 I% R; `
Q:谢谢。学到东西了: q7 J, b4 x6 l M* u
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
8 @+ @1 c0 a+ J0 U e0 ^# }: LQ:明白了3 D. C1 s2 f" g0 D
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发表于 2018-6-29 10:47:25
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