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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 R v- y! D# K; ^/ sIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements" c1 X+ c& N& Q- A4 _
of Solid-State Lighting Products+ t& P) Q: n3 R) u
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。0 X$ n1 `/ p3 x7 s* q
第二个是 79流明光效测试报告。LM79整灯的吧。
5 U: H; r: h+ k5 }; g# oThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?9 O2 g. t: V# q' n% L
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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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/ `5 a; C8 }( HLM79, 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.( o# o9 s$ p& j8 x; v) S+ ~
, l9 @1 B: F' B! B I0 ~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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5 ~" O$ h( K- @2 ?- VLM80 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.* C- c2 C. @; q
Q:寿命L-70是啥
: a) ~2 W. X1 p) N6 {A:维持70%光通量的寿命
) J3 Z4 V+ ?$ t0 P% L: Q, u" u, uQ:谢谢。学到东西了
2 q* F+ Z& s2 x' ]: H N/ W) ]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6 Q3 O. [3 D. C4 o; w+ d* `, B# @
Q:明白了% X2 i: E2 D7 p4 y, f
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发表于 2018-6-29 10:47:25
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