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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; N. W& c* \$ _
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements9 E8 z$ u3 i9 O3 U! X; A" |6 g
of Solid-State Lighting Products5 @7 H4 y3 l5 o0 v' v
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。
2 T$ G1 ~: V" R8 b' x9 g" X4 u第二个是 79流明光效测试报告。LM79整灯的吧。
4 M. X& f9 H* M+ U1 KThe 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).8 G5 z) s. c' \0 S7 ?7 |* {
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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# Q0 a4 T& {. _* O
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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.7 z, d7 X, s* r& [& S+ a
Q:寿命L-70是啥" l5 m/ K7 A D: _5 i2 ~6 U
A:维持70%光通量的寿命
! m' u& O3 F) V; C1 s0 j7 H# d# [Q:谢谢。学到东西了+ h$ g5 q- k% u
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
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发表于 2018-6-29 10:47:25
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