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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5 |4 _* @% p# @- x
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements1 J7 ?* z; r) b8 j
of Solid-State Lighting Products
3 {8 J6 ~( W O3 ~# y8 \+ 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。
& ~8 L8 l9 }! Z8 J第二个是 79流明光效测试报告。LM79整灯的吧。) `' ^& i4 T8 h* i7 c. Z
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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/ \! F6 G7 ~) Q" z) m2 `7 JL70 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.. V9 r7 _6 _# Q
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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.
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8 _1 g" i% g" V% V! q* f7 vLM80 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.0 |5 E/ M W$ l9 l- m& I4 [. t
Q:寿命L-70是啥
6 r5 F* z1 t" c+ WA:维持70%光通量的寿命; A4 l5 k, f9 Q1 e+ N
Q:谢谢。学到东西了
+ r' g' l: r) A% G: x }% oA: 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
3 I3 G3 d' p9 _6 u5 V* S7 ZQ:明白了* U/ L( H* a: {! u
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发表于 2018-6-29 10:47:25
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