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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 B' w8 p+ U& CIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements6 R) j; ?0 B' x: s! @, a' q
of Solid-State Lighting Products9 r- J) V% T+ u6 v' V1 H0 R: D& M
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。2 d( N3 h0 b$ D" `! w( o, m
第二个是 79流明光效测试报告。LM79整灯的吧。
. I! f& c2 c4 x! u8 BThe 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).
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+ p2 G( o4 y7 K( x0 _8 HLM79, 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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" p4 I1 f# `2 z# JLM80, 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.; M M) Y, m/ Q' G3 z9 l) [% b
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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.
: n( F/ Z$ z7 `3 K9 yQ:寿命L-70是啥2 ~6 _2 j/ z$ F$ m$ B
A:维持70%光通量的寿命" u" r' B. t) x5 P! L
Q:谢谢。学到东西了
8 C1 g) b. e- y. R% |& C% eA: 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
4 o3 d0 J) G1 d e T: b- T# A3 M' MQ:明白了. R, Y+ d/ ^2 T% F. Q
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发表于 2018-6-29 10:47:25
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