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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
' {- _! `/ G" p- g8 f1 |5 i, X; NIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements& t1 I1 F+ f# S/ t2 a
of Solid-State Lighting Products
" o3 ~% H" _, I6 E! OA: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。
4 M6 r, C& l4 I; G第二个是 79流明光效测试报告。LM79整灯的吧。: _' I, }+ N. W
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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( X6 c. Z7 w( i) l$ T5 s2 _' m3 HL70 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). @9 B6 D- H1 c
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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.7 n! v' p, C2 Z5 X, z
, |! `( {/ s9 r. C" g' v+ MLM80, 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.) {5 e* a' l& i/ G0 C6 r# H
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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.
) j% f% q+ _) w0 \( P+ N# SQ:寿命L-70是啥- y& ]: _; c! d/ [2 A# Y0 O- ?
A:维持70%光通量的寿命
$ D* p% X5 D, m; w+ e7 t0 A9 eQ:谢谢。学到东西了8 q2 Z' ?9 c4 l4 |) B6 L* o- m1 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
$ m: x h3 s9 d: f( \! \ i8 tQ:明白了! c! h- \, c8 B6 T2 P9 G
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