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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
! u/ }( s. V6 c* x) B( W+ E7 EIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements! Z: }/ N* e H9 {' d9 Q
of Solid-State Lighting Products/ Q! D$ J6 C# a! O- m+ `% t" M
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。9 @0 ]/ A* A% b5 ]1 i3 k- R
第二个是 79流明光效测试报告。LM79整灯的吧。8 d6 Z! T0 L3 B8 ]$ X
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).9 j6 ~% l% V3 R* Z ^4 z
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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.5 f3 I8 w* L6 C$ U' x2 m4 Q2 {
# S% r, V2 U6 a G3 ^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. }9 w( \, M- k; p9 y' P. ^
$ v E" l( @/ u. H* ~( y* NLM80 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.( X" m& V4 W3 H- V2 K
Q:寿命L-70是啥
7 E' U; u0 J/ EA:维持70%光通量的寿命8 E2 j; c( w9 }- x R0 s
Q:谢谢。学到东西了
2 D D5 l: T: v9 jA: 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
) ^& V! Y0 @# i4 }* gQ:明白了
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发表于 2018-6-29 10:47:25
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