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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
( E# I8 Y# f9 v- yIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
6 E/ }! D; e. [- Gof Solid-State Lighting Products+ i( {) ?: |0 W3 R6 ^
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 m- @* C0 A, l% x: g, f1 j
第二个是 79流明光效测试报告。LM79整灯的吧。) x/ D( x8 q: m4 R. _ n: G
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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9 q, R$ e$ r) y2 I& u5 w( e; sL70 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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4 q$ G( i# D$ s7 ]: s7 [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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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." e( F- R# |( I" M H. _4 Z
/ x" u; t8 B* o* u& @1 b5 _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.
0 E# j5 n$ d+ H5 u/ HQ:寿命L-70是啥 k! g8 ?% Y" h4 k* e/ w1 Z7 A
A:维持70%光通量的寿命
4 M! Q b# b, F5 JQ:谢谢。学到东西了3 k$ J( F0 x2 f% x
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4 R7 l# z e5 |# ^. Y1 u5 r/ |
Q:明白了7 n' V( J X5 G: Q9 Z' M8 w
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发表于 2018-6-29 10:47:25
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