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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* r/ o5 N* o; U$ S8 e" a# J
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
3 H! s! i6 I2 G8 ^: A% Bof Solid-State Lighting Products" m; e$ Z! t' R( J3 N6 J' \! y
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。
1 L4 K6 I( D( Y6 K ?第二个是 79流明光效测试报告。LM79整灯的吧。: t2 b E; M- |4 U) O
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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0 ]" J% u/ R7 w0 |" NLM79, 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. g0 L: T9 x% g+ V0 i
2 j/ X6 Q' q& I6 Q; ?# sLM80, 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.( w) {$ R- ^; F! s
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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.
5 F( J N! O+ [0 S, N# LQ:寿命L-70是啥
9 G" b& x+ m9 D9 r4 jA:维持70%光通量的寿命
2 g( D# ^5 j+ Z2 dQ:谢谢。学到东西了( x. _/ S& S6 N4 H& I
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2 K8 _. Q- Q& y2 C# z. b2 N0 ]
Q:明白了
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发表于 2018-6-29 10:47:25
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