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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 V3 {" ?* ?2 e7 O) x5 H a; l/ i
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
6 n: L6 L3 P8 sof Solid-State Lighting Products4 A' n7 r6 b/ X; M7 ^1 z
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。/ z2 {# K2 P( u
第二个是 79流明光效测试报告。LM79整灯的吧。
' r; e! E4 X( w. z- YThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?0 R/ J6 f& E+ p6 k
5 m: x2 u+ E1 P$ U- QL70 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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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.
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$ |' c9 o, f7 R6 a9 sLM80, 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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/ _; [$ h( ~: S4 nLM80 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.
) a: N4 b; P4 y6 n, \2 UQ:寿命L-70是啥* L' P3 T0 ^" n
A:维持70%光通量的寿命6 S, V9 F+ c$ G* c" _
Q:谢谢。学到东西了) I3 m2 X+ d4 \& C! ^8 z
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
* C7 y* `2 ~5 b9 W4 fQ:明白了
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发表于 2018-6-29 10:47:25
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