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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 V# N9 X# Q) S: X# W
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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6 F2 h Q3 c: c9 {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。 p' z- [ s" O8 c; w/ z
第二个是 79流明光效测试报告。LM79整灯的吧。" x! u# C' I$ q$ I) b- W0 K
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? }) U2 k, D$ u! ?/ v
8 N* d" [& {! Z5 K- ?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./ l! x! g& z/ v5 n* j
& D( u: [5 }) h4 `6 c4 RLM80, 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.: t0 U( X7 v/ E* N
( |# ?. `+ n5 n+ ]+ m2 ILM80 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.
5 b! }& B6 _' T1 h. WQ:寿命L-70是啥
8 g, [3 ]. Y: Z: eA:维持70%光通量的寿命! v. ]) E$ {2 [+ D! [6 d7 Z' |! G
Q:谢谢。学到东西了
2 m ?# X( w$ H# x7 H2 FA: 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) U6 v. h. T% x1 c2 H( @& U# P
Q:明白了: F5 T, a7 J$ U+ T
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发表于 2018-6-29 10:47:25
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