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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 W. y% c# v1 ^5 T4 \6 L7 |+ IIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements. h& W$ G& Y n( R7 Z
of Solid-State Lighting Products* o- F. u; r- @# v
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。" Z- u' E* B6 y1 I# Y" [1 ^; y# Q
第二个是 79流明光效测试报告。LM79整灯的吧。8 ?& ?" {5 u7 u6 i
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?9 H6 k/ _/ d# L5 E" D: u1 D
0 j' T$ ?2 t2 { J, l3 k; eL70 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.4 [3 C8 c C# i1 b0 t
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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.
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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.0 J; B2 W: X" @5 X* G( {2 @9 n
Q:寿命L-70是啥
' @- P% ^ M; I) SA:维持70%光通量的寿命
" q1 L; V7 t y4 r7 y" m4 PQ:谢谢。学到东西了! C7 L' P5 W& m+ N- e y q. B
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
( `$ H. j* M2 `) E QQ:明白了9 U& e) t4 t( p" e% m6 Y# }
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