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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
$ [8 f1 ~+ R( P% a! X! x5 X' AIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements. r# E2 B, T% v( S- @( |( n+ w* ~
of Solid-State Lighting Products4 d6 Z9 e) P+ S3 U( Z6 f
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。
. n5 u* N: [: K' r; }# k2 Z第二个是 79流明光效测试报告。LM79整灯的吧。% K5 L, }$ K) ~
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).+ c7 S! x/ j/ [
# q" f" z5 K" m/ ^, N- h( cLM79, 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." ~( |3 x$ j F
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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.6 I& }5 x" H3 U7 U
Q:寿命L-70是啥& V W$ D6 y) v% Y% r
A:维持70%光通量的寿命
2 P. H( A& m3 R. m% L0 p" AQ:谢谢。学到东西了
5 n1 J; P% y) {* H8 v4 N, H6 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& `& I9 ~4 \0 d" A, s
Q:明白了4 e2 r0 f$ N+ }4 I( |' M0 }
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发表于 2018-6-29 10:47:25
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