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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. m9 ~1 y" U$ E7 c2 F$ a. T, f8 ]
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
- y* a2 Z) B2 Q/ A% iof Solid-State Lighting Products. D' }8 m4 |7 b# A+ s
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。4 ?9 t" b1 v3 B$ W3 x, y
第二个是 79流明光效测试报告。LM79整灯的吧。
1 B; i# S0 |* v# `1 t- p# g6 x2 I0 SThe 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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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).% w: I. i4 U) v( ?
% }8 \" G* r0 j. E* _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.0 e' ] X, W2 d9 ?& C7 b. i' D
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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.( f( N9 e, W9 X
5 [% X9 t/ [0 j2 JLM80 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., U6 ~ a2 h) K9 K3 j3 V8 O: ]
Q:寿命L-70是啥
2 t* j2 ]* x8 [* C1 @% s# s# ?9 ~A:维持70%光通量的寿命) x# ]8 `9 f4 j4 s, P
Q:谢谢。学到东西了: `6 H! U, e' \( r" Z) m
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
% M+ y7 u ]+ O# u# E4 }8 iQ:明白了
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发表于 2018-6-29 10:47:25
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