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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
/ d% x W( m1 ?/ w& ]IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements3 L8 S4 B8 ]2 E0 t- V0 t& r& M9 |
of Solid-State Lighting Products3 K5 [& t) i( }! {! @
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。- n0 I7 I9 w/ l) @6 ^" u) B8 a
第二个是 79流明光效测试报告。LM79整灯的吧。
% `9 D/ h3 W: @% H9 eThe 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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: S& y8 k+ C0 z5 r# P( YLM79, 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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2 b2 O6 z0 n& dLM80 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.
5 [5 G9 w# `! i/ I, ^, `Q:寿命L-70是啥
" M0 R) }' ^; aA:维持70%光通量的寿命3 Q& H$ W' W2 o
Q:谢谢。学到东西了: ]2 p* S2 X; k6 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, J, w2 j; a. b ~8 |
Q:明白了
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发表于 2018-6-29 10:47:25
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