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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0 ^. F! J4 ? `+ J+ q
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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6 x8 M& m; s) V) j2 p/ a$ aA: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。/ J* V7 Z8 F( u/ {( X
第二个是 79流明光效测试报告。LM79整灯的吧。! v( J" X' i3 l, x: x
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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8 n, T% C) H! M! m" ~0 T+ T# @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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. E3 b% C8 ?" k' ~+ u8 zLM79, 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.1 y4 C* U9 @, j3 T; d
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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.$ b1 p( z0 t; F
Q:寿命L-70是啥
) I" ?0 ` \ L+ e- E5 n" nA:维持70%光通量的寿命
- {3 R5 ~0 r: L. RQ:谢谢。学到东西了/ a6 a: c: y" v+ }0 y
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
* y+ R8 Z+ k! f' I0 T$ {Q:明白了( {+ s+ @" U: s
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发表于 2018-6-29 10:47:25
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