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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 Y1 T1 E+ y+ hIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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1 _ H* i3 S1 w& n. u5 G: gA: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: Y- p: K( \- B; r s$ g第二个是 79流明光效测试报告。LM79整灯的吧。
3 ?% |+ `3 A1 x; {. F! t ]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?( n/ k$ x- l+ q- Q3 a: ?7 ~
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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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# t8 H' @+ w) C; C0 h# PLM79, 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.9 G9 O$ E$ q# c4 {
( O9 {' a& C; q: ILM80, 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./ K I" |- h% J4 `) L# d
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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.9 G2 M0 I5 x$ ]
Q:寿命L-70是啥
+ Y4 G: p b! W7 F9 n2 u( BA:维持70%光通量的寿命; l Y9 R0 _9 t
Q:谢谢。学到东西了
% e6 s9 K& O2 J9 A& M% h! t) K, kA: 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 a5 Q5 _3 S2 h& a! E3 T3 L; b
Q:明白了% S' z- l7 \. V( Q! ]6 {
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发表于 2018-6-29 10:47:25
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