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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$ G7 T, A% J# Q. A: B) P
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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! B) @* N7 z7 w) S3 OA: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。# S" w# T; D4 d2 z6 Q
第二个是 79流明光效测试报告。LM79整灯的吧。8 G8 S: D2 M# d. C: u: `/ N
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?/ ]% T1 Z+ ^0 v, g" T i/ R; D# u
4 ]# i; z( w4 j- T2 o- TL70 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./ N/ K: P1 ?" d% ]+ s- ^% k
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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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8 m$ e4 G* a: R; \* ZLM80 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.! y C2 u L! X, e4 p* I
Q:寿命L-70是啥
7 h- E* Y, k! t) W* E r' S% UA:维持70%光通量的寿命
{3 g, a G5 m- c& t+ ^( QQ:谢谢。学到东西了! E5 }: S1 Q7 ]" ?, K2 d8 ?5 z
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% a% Y% ~ s$ V2 M( X7 @& u
Q:明白了
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发表于 2018-6-29 10:47:25
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