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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
" ?/ [- y1 _, N, P- e& yIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements I, L# A* Y0 x# v, n6 i
of Solid-State Lighting Products# `# [+ _$ Y4 x. \6 K, ^, C, `: ?2 z* U
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。3 _9 X* t) g) f# A9 y
第二个是 79流明光效测试报告。LM79整灯的吧。8 r) R2 A& k1 M4 W+ p
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?$ i6 i' X6 n+ g, J! f$ v
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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).& @5 G1 V+ ?0 f2 E* o
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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.# v7 h; z5 k! P
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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 Q9 }8 a5 Q9 ~9 i8 B
( G& Q5 g' P! D- ~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.& R) |3 g0 S) o; P' q" {
Q:寿命L-70是啥
9 u: q) }0 Y1 A( ~* O" V. CA:维持70%光通量的寿命
4 ^* T6 f1 L6 \ E+ }Q:谢谢。学到东西了
4 a b! {+ q3 P, H; f4 Z* K% G2 c1 LA: 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
! ^7 J% U4 G/ V$ N/ iQ:明白了( R7 t2 x9 F/ B `) M; l
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发表于 2018-6-29 10:47:25
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