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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; n: E% u9 N' X* m0 H* E* z
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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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。
3 p# B; c! e* P- S. `0 s1 b第二个是 79流明光效测试报告。LM79整灯的吧。3 ^. J! {) c# K% Y# i6 s7 b
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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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).
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( R- d+ P$ l9 W# s5 s, XLM79, 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.0 k' s+ W+ t B: d% R g/ z. J
. H8 j& e# P8 D: b9 Y, z' |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.
+ y f/ Q) j' aQ:寿命L-70是啥6 ?% |. k; Z1 U+ g H; D7 h2 K; k% y
A:维持70%光通量的寿命; ~4 O* X3 h1 z+ T. n: f; }0 Z$ _4 {
Q:谢谢。学到东西了$ d" D2 p/ R5 L9 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
; O7 N' ?' c* x% n3 u7 Q8 [Q:明白了6 F3 C( l: h- G, S O" ]# d j6 O
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发表于 2018-6-29 10:47:25
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