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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9 R% D- j \/ h, h& K G
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements( u, V" k7 N* T3 S* ^) T
of Solid-State Lighting Products) ]2 O# n/ Q3 {- j4 e% S% x
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。
: u+ I! s8 k, j7 o9 q' a第二个是 79流明光效测试报告。LM79整灯的吧。
" F5 F4 T' X& O( K% gThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean? D; w) b7 u2 z% ?% b! q
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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).& }. e% O* J/ W: p6 u- i+ e# c. D
$ O) ]" o% J; X! G6 ?5 B) Y( {* Q9 OLM79, 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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5 E: O. c' w2 u3 ]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.8 Y4 Z- v& X3 j9 T8 b
Q:寿命L-70是啥
% S8 @/ r3 P% r% F9 p: JA:维持70%光通量的寿命6 T" [) i# A) X" }6 M
Q:谢谢。学到东西了
" { ]" F. ]! L$ o5 YA: 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
/ ^) Y+ z% `1 m( Y s% }" |Q:明白了
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发表于 2018-6-29 10:47:25
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