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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
: r) F) R) U4 O. X+ ]$ n! T% S) pIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements: N; A2 n2 _! }
of Solid-State Lighting Products
! p7 y* L& d, X) X" cA: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 `% o; F& R8 v3 I2 T3 K# w3 w第二个是 79流明光效测试报告。LM79整灯的吧。1 l( X* T* m# C% U
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). M6 @" w2 w+ a1 e1 g" v- w7 M' h$ i
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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.7 g2 S) h n2 s1 e; b& o; g
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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.0 X. @# I1 U- T8 g3 d ]5 H
Q:寿命L-70是啥2 A) P* B- |6 Y) q, p2 y$ A' o0 V
A:维持70%光通量的寿命. o4 h h+ D. h6 N, N1 U: ?' l
Q:谢谢。学到东西了% } g! C, }2 G2 l2 i% d _4 H
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3 F/ y. z- f! k4 P, [+ I
Q:明白了
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发表于 2018-6-29 10:47:25
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