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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
. h6 }- N6 |* C- P' s1 m5 CIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements) N2 x$ {; N; |% X& o) ]
of Solid-State Lighting Products
$ k5 a+ ?0 |! a! q) M; aA: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 l' @% o8 ^/ Y9 v7 ~第二个是 79流明光效测试报告。LM79整灯的吧。
$ K( v# Y7 c" g; {5 ^" \4 fThe 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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# C) ?3 s( R/ b* t% tL70 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).: s2 z& _: m5 R0 _! f
1 S N6 }; I' C9 P+ ]) C- PLM79, 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.( z, `* e9 p% b: c" b/ y
6 Q8 W2 d e: P/ L' OLM80, 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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) f/ ], ]1 D F9 S* P0 tLM80 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.
d' y) {( Z" P( }Q:寿命L-70是啥
" H( A9 W/ |! S0 B/ Q2 T# BA:维持70%光通量的寿命
, r6 e' n: R& A. [Q:谢谢。学到东西了- P, z$ r+ o: V/ R: |: O) V
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5 W/ C4 |( a# h8 l. }, I" x. }9 _
Q:明白了' T# l+ M, J2 K) X
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发表于 2018-6-29 10:47:25
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