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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 u5 d+ K: k- ]" @3 C% Z' y* V0 lIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
$ }9 y! d: N1 E* g6 j) m* zof Solid-State Lighting Products( A+ W1 x6 F, I* c0 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。: O1 K }% m3 [( @- a% B. z3 a
第二个是 79流明光效测试报告。LM79整灯的吧。7 X, ^- c+ z! @9 ^4 [
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?% l: K i% l4 ]9 B
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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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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.+ N* q5 ^2 [' _" p" n
1 s4 m. O2 x7 w! KLM80 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.
) I! x2 }" u% ~! {! N# t& a+ s' l5 aQ:寿命L-70是啥
9 \0 ]& U' h6 H0 b7 ?3 OA:维持70%光通量的寿命
. F/ n* p( W& q& AQ:谢谢。学到东西了
% {8 w4 y2 N3 K$ O& `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 F j& y0 G4 \Q:明白了% p3 O h t: y: a4 S" q
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发表于 2018-6-29 10:47:25
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