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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
; u5 G& u D+ v6 O6 cIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
: s e. u9 E* D% Q! T; {( s# V! Vof Solid-State Lighting Products
3 B, I* \- a! r& C( ~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。
7 @9 T) j5 V# K& |7 s# Q. t$ q第二个是 79流明光效测试报告。LM79整灯的吧。
F. @4 H5 [6 [) s* AThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?/ k: }$ f/ f; j+ D8 y
8 i1 A6 Y& m- Y* d. f! UL70 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).% A; S1 R( }7 U, d6 e8 k! \1 W) P
: |& A ?% q8 ZLM79, 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.
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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.
& x3 y" V, s2 I. y6 CQ:寿命L-70是啥
% ?% Q: N2 ]$ O7 vA:维持70%光通量的寿命
1 N& l! e, B. ~0 s, |Q:谢谢。学到东西了5 Y5 F2 ]) n" U- g6 [2 q
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9 x. K3 l1 |- ]7 \
Q:明白了
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发表于 2018-6-29 10:47:25
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