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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
S" g. c0 h- p- qIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
) y8 [0 q8 O. i- l3 L/ c4 Pof Solid-State Lighting Products
7 l8 v1 h2 W4 B: a2 pA: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。
/ b0 @* }( y) _9 j; B第二个是 79流明光效测试报告。LM79整灯的吧。/ \4 g0 t: ~& f& A2 k9 a
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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: }6 b% B1 k: p9 A$ t/ ?% gL70 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).# _8 T {" K, v* B
2 D) @- ]- \# xLM79, 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.' `+ d& L6 m* Q" B
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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.1 x; Z- Z6 H& h0 h1 X1 V% N
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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./ A# z5 V- N& h$ S" i1 Y6 T5 {, y
Q:寿命L-70是啥& P, J1 ]' G- l$ v
A:维持70%光通量的寿命
" ^$ H$ x6 D" |4 yQ:谢谢。学到东西了$ t' x9 r' L& {1 [# {
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
/ i! ^; C4 w5 w- B3 p# pQ:明白了
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发表于 2018-6-29 10:47:25
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