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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
( U9 Q9 _+ Z( x5 ^4 J0 L- VIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements4 A. d! b1 z; s" a. u
of Solid-State Lighting Products
7 B* y5 R+ W0 M* F3 zA: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。8 n! ]: Z X# b/ ]* W
第二个是 79流明光效测试报告。LM79整灯的吧。
2 a4 f) A" S8 eThe 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).5 R' g' z, h% x
! ]2 U/ w, o( [ `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.5 `: L4 e* f1 q1 r* ]
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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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1 f; L# P3 j, e* Q) ELM80 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.! V! A% ~+ X& \
Q:寿命L-70是啥
; l5 F. n$ Y% B6 @% N1 SA:维持70%光通量的寿命
$ y. X$ @9 a/ j, aQ:谢谢。学到东西了
5 q: M( H1 W' V6 }; K. LA: 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
( O' m9 S" N a, E+ vQ:明白了# K& P+ t+ O5 f
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发表于 2018-6-29 10:47:25
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