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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: n$ _, P" w) O9 S8 c
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
4 s& M9 y, I- r( j% {+ cof Solid-State Lighting Products# Y y0 t+ P( v- o
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。
/ r4 i- o& y4 b! v( @, x' }. @第二个是 79流明光效测试报告。LM79整灯的吧。( [3 O6 ]+ K2 W2 s: _
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).
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8 D, v# w: E" O$ ^8 X& |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.& q6 w& b$ k/ p/ E/ R6 V
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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.# q/ q( Q) H2 v9 w; R9 S w5 k
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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.: u. |1 P" H; \1 ] Y4 g
Q:寿命L-70是啥
* |( i( O( C( O @3 DA:维持70%光通量的寿命
* i" D/ X9 k' {% x3 MQ:谢谢。学到东西了7 ]' H# g; Y1 C. ^7 c: H
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
7 U' y4 o- P- S# B! _* }Q:明白了
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发表于 2018-6-29 10:47:25
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