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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
4 G, T5 g3 c% S/ jIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements! k4 J" W5 S( v$ a5 S
of Solid-State Lighting Products
3 d9 G; c4 O7 `5 y+ p/ U0 |( f3 jA: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。, g f6 B8 G# W! m
第二个是 79流明光效测试报告。LM79整灯的吧。" T# v+ B: S: S* A0 K& E
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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8 m. M" ?; ~* W6 ~3 }1 v6 PL70 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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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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! U7 F* Z) F! L/ V6 H& 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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/ B% o* _( ?: \* @+ @& f- hLM80 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.
: l1 s- X0 l% b, b% P% MQ:寿命L-70是啥
4 O4 L4 N# M- ?6 v0 yA:维持70%光通量的寿命( U5 P( Q1 U i0 K5 }7 E$ z0 }) @
Q:谢谢。学到东西了2 J/ i7 Z4 w- c& v4 e7 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8 X' ^; A3 E$ \. [
Q:明白了
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