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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
o! O; {5 o9 n5 I6 L' nIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements1 ]2 m2 h5 E9 R- f* \, U: J
of Solid-State Lighting Products; {# i4 Z9 T4 S8 o1 t3 R
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。
- q) q5 r& ]' w# C. g+ r) [第二个是 79流明光效测试报告。LM79整灯的吧。
/ Y- c' Z, o, ]7 l- g7 i( j# AThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?. ]6 y- Y; C( K4 t
/ p3 q; y- S0 p+ ]" w& _# rL70 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).0 I: R, D6 a4 _ @" }/ g
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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.
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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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2 i3 L% p0 _* f1 VLM80 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.
( Y9 Q/ Y9 n1 m h& L8 a6 j8 y8 ]Q:寿命L-70是啥
3 f7 h* ^0 m+ p/ t: x- AA:维持70%光通量的寿命
" o0 L# P+ G. d# v+ H0 J: `Q:谢谢。学到东西了
8 b! G9 K4 f% MA: 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
" b+ L! D& A' X: D! CQ:明白了- k0 R) T6 C6 {
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发表于 2018-6-29 10:47:25
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