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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7 s& b( `3 p! J1 M
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements" o' ~, S6 [5 }4 Z. ]
of Solid-State Lighting Products
7 H/ M% ?* l; F# t! p/ i x* A( QA: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 r* T6 Z4 Q$ k# S/ H
第二个是 79流明光效测试报告。LM79整灯的吧。! c: D; A* O4 Q% n- C/ b' C
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?1 [' P) l0 ?3 o& c- ~/ G6 [: e4 t) E
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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 F3 D' j' \2 ~5 ~0 P; ?7 i
! w+ J6 y6 N" g- |+ }8 W1 c" d: ZLM79, 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.% i9 c* `* X, B9 u8 l; h" ?( R" `
1 t1 L* [: G' i# h2 r$ b4 ILM80, 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.
" l( ~9 O! y# [" CQ:寿命L-70是啥+ u% |, [. _* T8 e) F: E( `% n
A:维持70%光通量的寿命/ h$ F1 v( z: J% E( S+ y, N
Q:谢谢。学到东西了
4 e7 ~, v" g6 L) N+ sA: 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
`, P; s0 Q' z) k- k4 y/ YQ:明白了
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发表于 2018-6-29 10:47:25
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