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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1 [( |. J% x/ [3 Q4 I$ }$ C3 D/ R/ U
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
3 v7 G2 s+ Z1 E3 [of Solid-State Lighting Products
, o# G7 a0 }6 ~: Q& O! ]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。& r* O/ X0 d9 P i& \& D
第二个是 79流明光效测试报告。LM79整灯的吧。
0 j y1 G& u/ lThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?3 ?) d7 E9 @: g
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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).+ x B; _: }- d) {8 c
3 T9 y2 o* T1 x" ~9 }* yLM79, 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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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.
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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.2 k' S: R8 s# c) M( i6 ~8 q. A
Q:寿命L-70是啥+ k' f( P- R3 I! s5 D( ^3 v
A:维持70%光通量的寿命5 D0 u9 D5 i5 c& B8 I1 ?' y& M. @
Q:谢谢。学到东西了" c& k) w% i8 p! F8 a
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
" ?& N& K, S _! {Q:明白了8 e+ ~9 j* D# r! l( L
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发表于 2018-6-29 10:47:25
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