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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
; A5 K! l) X& HIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements" w6 J6 \9 I6 m' g8 E% e! Z6 S
of Solid-State Lighting Products
. p3 F6 ?. n" ^% b' n- j# X, XA: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。( b- N6 {% N e
第二个是 79流明光效测试报告。LM79整灯的吧。/ h/ m2 a; k2 ]$ c% w' c) k3 M
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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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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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.3 u7 [9 |( _$ J) p% h1 A
" C9 |: n. |/ V( E! U- g8 L2 ULM80, 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., {) r7 {8 x; y
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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.
% U0 ^1 Y- e# w7 f5 u2 }Q:寿命L-70是啥# W6 R' U2 N% Y6 J8 `4 v- ^
A:维持70%光通量的寿命
2 {% v$ A: {+ @9 K, fQ:谢谢。学到东西了5 |* j h( Q4 n! i' _( v$ g
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
( r3 L* o3 `' t- L; | yQ:明白了# L [% n$ V, ?( q, ]
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发表于 2018-6-29 10:47:25
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