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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
], _ T9 p O( m$ W7 `4 dIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements+ X. T. U1 s* {( H! F. v. ?; }
of Solid-State Lighting Products1 e# F& p- z( o2 c" o7 z
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。5 v4 Q4 q9 V8 V6 p% ] ]+ M1 A9 C; V
第二个是 79流明光效测试报告。LM79整灯的吧。3 ~9 G# l7 N1 [- t( F6 h
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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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.( i' |( H0 T5 l6 b* e
_+ {% X; ?! D& N [ n0 E5 xLM80, 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.. U# G/ m( K0 Y
% o9 M. X+ O$ I7 e9 pLM80 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., [) n9 J2 @. c4 e f
Q:寿命L-70是啥
0 p& ^6 @+ u. `A:维持70%光通量的寿命
. D0 W0 Z7 U& C( _: q- f, `+ {Q:谢谢。学到东西了
4 `1 G, k/ S/ ]$ O X, O3 ?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" x& W: q: P! i# _: j6 D
Q:明白了
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