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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
' q" }! E1 h: E; [; e6 RIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements1 s: p: @; B, v# ?
of Solid-State Lighting Products+ D# r: z; u7 L% P9 | t1 b5 C6 h
A: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。
' Z$ s) V3 d: [) D- M第二个是 79流明光效测试报告。LM79整灯的吧。. s2 a* g5 `" m/ |
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).! V/ w1 @0 I( T e
5 N7 O6 T& j4 \, G- LLM79, 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. ?6 G# N0 r' |( C. e5 C
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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.0 h! S( |8 t! H. p# W) 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.' X) b. z* K ]' C; Z+ @* B
Q:寿命L-70是啥: Y; I3 E$ t5 w) [: p9 N
A:维持70%光通量的寿命4 J& q4 L+ N- J; |' x, O/ ^3 d) J- J" d
Q:谢谢。学到东西了
5 z& L- V7 T% c BA: 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. J7 `6 n% W0 l, r8 R& z# H
Q:明白了; l1 _& g/ H# b2 W4 c, F
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发表于 2018-6-29 10:47:25
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