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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
% n6 ]$ K) a8 l# V: A2 C S; EIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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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。! A2 p3 l# x2 F( N3 F
第二个是 79流明光效测试报告。LM79整灯的吧。
; H" {( ]* y3 W! O( j9 y* TThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?- V8 @/ b4 M. j
* d1 c& r" G5 `" L( l7 A1 t& L! JL70 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).' f4 [: ~4 o, o9 k% Y
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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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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.
9 l& X9 z) X( Q8 E3 I. K0 b) k' W: NQ:寿命L-70是啥
( r: S! u& f0 h3 UA:维持70%光通量的寿命. F5 |* J3 K3 n3 y4 l+ R' D g$ Q
Q:谢谢。学到东西了
/ S& \ E1 H& l% G' E" WA: 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% G8 I* J( a- N1 K, Z
Q:明白了2 g1 O, k2 z1 [+ P1 i: {3 y
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发表于 2018-6-29 10:47:25
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