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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
9 h9 ?( t5 c0 d7 ]IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
8 L! L* ?) X# lof Solid-State Lighting Products8 B, R* B/ c3 ~$ K) K
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- d, g8 V1 @+ j0 f0 O1 r
第二个是 79流明光效测试报告。LM79整灯的吧。0 Q0 H* J; y% P1 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?
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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).+ ~( e+ o/ e- g# H. X
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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.$ O- [) R6 u; G- m
7 `+ E* F- k$ g! z- K8 y7 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.( }# `0 j1 g. m/ X2 Q
9 F) r0 p, @0 I: ]0 RLM80 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.
# k) r3 ^( O7 n0 M( n' A! mQ:寿命L-70是啥
% k* R( p/ g( L" w/ W3 j' U! N1 Y$ @A:维持70%光通量的寿命
# z. H+ g5 ^$ T9 w* t% a$ aQ:谢谢。学到东西了2 H. b) ?# ]: _+ j
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
" K; ?2 B; B0 }Q:明白了
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发表于 2018-6-29 10:47:25
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