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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
% e! l( T& n! N3 rIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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5 ` ]- \- c4 F4 J: {. LA: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。
. T' B: d% W& O% j4 n# O第二个是 79流明光效测试报告。LM79整灯的吧。8 c% K( o8 u4 \ A& H( D9 ^
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).) [6 d% f& N* ?+ L
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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.( U$ C1 ]/ K2 g
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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.. ~& S2 \2 y0 q
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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.; j5 Q1 k! c7 L$ }7 z
Q:寿命L-70是啥) D- B7 A p' o6 I0 |9 v
A:维持70%光通量的寿命9 W# V6 N1 y% Q
Q:谢谢。学到东西了
5 L, Q" w1 V& X6 b! `" yA: 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
3 K# j! {9 R/ s) y9 `0 h J( P: NQ:明白了2 U) l* h F5 v
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发表于 2018-6-29 10:47:25
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