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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, D7 W$ w. A4 s: S! S7 k$ J
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements, r8 V+ _. ^3 L; @8 H
of Solid-State Lighting Products
/ \0 w+ q. h+ Z' x) F$ xA: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。" E( b* h6 K, w! P( o* p
第二个是 79流明光效测试报告。LM79整灯的吧。+ Z$ o0 x/ Y; \/ A( x
The 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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% |/ _+ A, I- s% X& [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).3 W! _* s# J, G1 y6 g! |
9 ]6 ^# B# w) L+ `% T( q' Q( Z+ ?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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! W7 r/ C# d) q' z4 k: ^* CLM80, 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.
% H8 M3 q& Y$ V+ MQ:寿命L-70是啥
/ g( A; @9 h) _A:维持70%光通量的寿命
% p, S J0 b1 D) NQ:谢谢。学到东西了% r6 P% _+ v$ U9 n M0 r
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
. @, A4 \$ z7 E; I. pQ:明白了
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发表于 2018-6-29 10:47:25
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