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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0 q" J9 o- P! J* Z& P% i/ m) |0 T/ o
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
0 b' [* K+ D+ Z! l' Rof Solid-State Lighting Products; I' }- a& T% S- G; m1 c
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。5 n+ a: Y' y: T/ N: ]. ^( F
第二个是 79流明光效测试报告。LM79整灯的吧。
* V$ {4 e; }/ [) D/ L5 T8 n6 PThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?4 |8 F2 Y4 x7 O) O
4 Y6 S2 a" G7 i7 F, X2 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).
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9 F. [; ^; A- U; VLM79, 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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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.
- f9 J. s& B1 e0 ]: aQ:寿命L-70是啥
" X- @4 Q* E5 d' F, w1 vA:维持70%光通量的寿命8 B+ r9 d$ t, f% Z8 J4 s
Q:谢谢。学到东西了" `4 r8 B+ P9 D! |
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% b0 B; P" q- t& }# E# P, F/ |
Q:明白了: G* ?2 f) _8 X# ]$ V" t
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发表于 2018-6-29 10:47:25
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