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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
1 P0 s4 m# W, R( q eIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
% l5 R- i. {, Hof Solid-State Lighting Products
" _# ^8 J1 R4 t4 q1 j; PA: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。0 v {* G9 A/ t
第二个是 79流明光效测试报告。LM79整灯的吧。
1 c- `9 X# M7 r6 g# tThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?, o* U7 j: v4 }
$ e9 _. u! `" a/ U% vL70 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.0 m+ S9 Z. ^2 Q. x
( O5 _: g8 r1 z2 wLM80, 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.( X5 ?" s! i* b/ [
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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.1 P" s7 r2 R" v1 Z: }& l
Q:寿命L-70是啥8 I, ?/ i$ W7 |0 d+ K, _+ g" i" y
A:维持70%光通量的寿命4 K, ~8 f4 _; o& c: P: Y" p( ]
Q:谢谢。学到东西了
! ~* E, S. f7 Y7 `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4 ]- J3 c3 n) P3 A- n
Q:明白了! s) b% b$ T6 Z# c' r
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发表于 2018-6-29 10:47:25
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