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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
) D* D. V, f# m# a" R! x, \IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
3 e; W; |, U$ X1 g( pof Solid-State Lighting Products
: u/ X# X* @* D& e/ f+ MA: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。* ]) m/ u5 u5 w0 E7 E$ ]( c9 v6 N
第二个是 79流明光效测试报告。LM79整灯的吧。
! I% b5 f a* X9 `5 K/ q/ lThe 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)., c( k! n6 i. H) i: u
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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.9 _. l" u7 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.: R- _7 R" a; y D6 x5 b6 U+ c$ s, D! I
4 b$ n. m1 l* [0 @7 I e! HLM80 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.
: Z9 n* G* O, {3 ZQ:寿命L-70是啥
+ e/ f5 D1 n1 X2 mA:维持70%光通量的寿命% j; J) w) n0 q! m- N
Q:谢谢。学到东西了5 F# x) @2 c6 `. I. J% X, C
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" P6 f- T, P% G# x1 R
Q:明白了
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发表于 2018-6-29 10:47:25
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