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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
* H; b8 |; p) v1 T3 IIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
# E4 e# C! v0 R! ^) x; hof Solid-State Lighting Products1 P% ]. o" Q5 L. ` b0 u/ m9 J5 X
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。
( ]; ~! L4 P) R; S0 b2 B第二个是 79流明光效测试报告。LM79整灯的吧。
; e# ~* z& w b+ c( u& JThe 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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' E) f) r/ g! \% `) I9 H( T4 yL70 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. q9 I: r3 \, G0 F7 w
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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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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.
2 P' y% A$ i" d" ~9 i9 x% ^Q:寿命L-70是啥: F l* K/ j9 Z8 P' f; T, V
A:维持70%光通量的寿命
2 A. q& `: z+ G/ A+ \Q:谢谢。学到东西了! ^" j4 @( _) D$ C0 a9 Q* z, w; Q
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, }0 }& }! l' D7 ?& MQ:明白了2 ?8 z& b, {) M4 c8 U9 m K
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发表于 2018-6-29 10:47:25
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