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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
4 s7 u D" u0 }. {9 ~IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements' D# d; M+ O/ h
of Solid-State Lighting Products
+ r) L$ [. 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。% x! N6 Z) `+ |1 o
第二个是 79流明光效测试报告。LM79整灯的吧。
2 h/ c; |0 c7 H, H* i/ V" ?) tThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?/ q1 L; O% L, ~+ A# ?# I; c1 j
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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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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.: F# C" K. f& ^" S4 {. x7 o8 d
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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.) ]5 V$ W! i7 a" i; H% v# g7 x
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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.4 S. M; Z0 ^' p# _: f' H
Q:寿命L-70是啥
- p S" k& D. S4 Y+ x% l) x8 rA:维持70%光通量的寿命% p C- Z) D# g
Q:谢谢。学到东西了' L( z( X \) r2 d+ Y8 x8 @
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
7 m! V* V9 P& Y% J! |' NQ:明白了
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