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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
( h# t4 y* G& f; iIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements f* L+ `- L# N# j' `) L
of Solid-State Lighting Products
! }1 ]+ l5 }+ L+ J$ F! NA: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+ A7 k+ @6 Z7 x. Y
第二个是 79流明光效测试报告。LM79整灯的吧。/ o: W5 h% T7 s1 \% c# W
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?, B. D M. v2 y* Q) \2 e
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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.
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% h, ?% k- f# z) P L' z+ pLM80, 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.
3 @ I* @' z2 ~6 }6 _$ c2 PQ:寿命L-70是啥# l9 V8 h: ]. y, [
A:维持70%光通量的寿命& i" ?- i) ^/ J2 m9 o
Q:谢谢。学到东西了
$ r+ s7 I, p: [+ _% k8 b+ ~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
" S6 d: l8 j" N/ A. xQ:明白了5 W! _5 r* X% W! P" ?
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发表于 2018-6-29 10:47:25
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