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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
# d+ q, D- G$ c4 ?* a V* KIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements1 j) u- J. q& h! I, L5 E
of Solid-State Lighting Products
! F, Q0 n k7 [+ a, _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。
7 o7 T* R! ^1 p) r第二个是 79流明光效测试报告。LM79整灯的吧。
8 ~- W* P; T+ XThe 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).
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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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6 F$ R7 i" ?/ F1 ZLM80, 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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* B1 W Q( S% C' ^1 n" w% MLM80 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.8 L6 {2 C% x9 b. x, {
Q:寿命L-70是啥5 L- c' z( ?% d. o* r. P, E& `6 |% m
A:维持70%光通量的寿命
+ r' f' q1 C2 w9 H" c3 pQ:谢谢。学到东西了 V e3 `( T1 \$ g7 r7 C
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
" F1 `: t, T% f" U' J- P) iQ:明白了1 H+ u. m) j( I% b
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发表于 2018-6-29 10:47:25
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