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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3 _& K7 w% V6 p4 D0 S& m- P
IESNA 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。4 S% h( u: X8 W2 J9 Z( O. V4 V
第二个是 79流明光效测试报告。LM79整灯的吧。6 p6 j: L D7 ?" y- H( o$ g8 q
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?
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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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& Q, L5 L& |% f; [- i) E2 BLM79, 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.; C2 `/ a: _; n5 ^
, ~2 j; k2 t1 {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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9 V! N: ]1 S* g+ ]3 ZLM80 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.; X* f. a+ w8 `6 M' d d: f' g7 C
Q:寿命L-70是啥
% y1 o8 M+ m) Z2 b) D$ }; ` Y+ |. q3 }A:维持70%光通量的寿命1 k7 S5 v7 D$ i
Q:谢谢。学到东西了
/ `; U" v2 x# Y/ I( AA: 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
- R/ N. c! r- g' E1 ?Q:明白了
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发表于 2018-6-29 10:47:25
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