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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
" e* E: Q6 j. p% N$ m% I w2 R1 X/ W, mIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
0 w: E) _' w% U% `1 @6 ^of Solid-State Lighting Products! e8 S" G# W, l7 {3 U1 ]2 s& D
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。
% Q1 B/ b' `, G+ O/ }+ l& E7 }7 n k第二个是 79流明光效测试报告。LM79整灯的吧。
% Y" Z8 e$ V# Z4 t' _. T2 s7 \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?) a* |3 O$ h% W# b5 d) V2 q& J
{3 D+ k4 r1 vL70 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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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.- {7 P6 H( B! `: W% U& W
8 h, `5 e$ P1 C( s. m) qLM80 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.
! u1 H- B# s4 jQ:寿命L-70是啥
1 d6 e% e }5 zA:维持70%光通量的寿命
8 \0 M! a% R2 [# n- _2 ?Q:谢谢。学到东西了
, x e7 g3 ^0 t# ^; C, vA: 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
1 J, j8 c# j2 a* p: b( HQ:明白了
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发表于 2018-6-29 10:47:25
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