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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9 f! h9 l' w6 Q* w6 B2 v0 s% ~: m
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements; b9 L4 [, }: u5 F
of Solid-State Lighting Products
* m& V" U6 @3 |& oA: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。$ T6 e' x* V: S" p3 d# d
第二个是 79流明光效测试报告。LM79整灯的吧。
6 i& e- }+ h# RThe 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).3 M% N0 @( G4 l6 B/ L
+ U' `, m% w7 c6 l0 H% z$ q, T5 }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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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.; u# L; J4 b6 S0 n8 \
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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.9 Y- g! o% r2 Q3 X# m8 T# ?* n
Q:寿命L-70是啥7 g9 m2 u! d: u% d4 v! M) K
A:维持70%光通量的寿命0 B" I4 W8 {- ?+ u6 _
Q:谢谢。学到东西了
- ~6 q: t! q. gA: 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( u) W/ n" v3 y3 [ @0 ]
Q:明白了
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发表于 2018-6-29 10:47:25
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