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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/ Y2 z4 F. D7 l; F8 {3 m
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
' B! _4 o( _+ B2 m; qof Solid-State Lighting Products
; [: B) o) k$ e, {$ o' G1 r hA: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。
' T" g8 ~ U+ s* y9 U第二个是 79流明光效测试报告。LM79整灯的吧。
! `3 n+ J3 H. G. ?! zThe 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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; f$ [+ @5 P. U/ T- ~( x7 y' wL70 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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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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9 u7 F/ }6 R# [) c( [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.' Q6 E0 a! W1 _8 Q( P. A: a3 P
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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., J' Z7 \6 D% t( G+ c; v
Q:寿命L-70是啥
, f$ A- [. b8 fA:维持70%光通量的寿命
; k/ U* l# e8 MQ:谢谢。学到东西了3 z3 A8 ?' ?5 z- z5 B$ Y# e! ]' k
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: a. V0 n$ M/ b% ^: b) I$ |
Q:明白了 }& U y( v' V/ M5 B$ q) A; }
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发表于 2018-6-29 10:47:25
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