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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1 }5 I& y3 F. V) B3 s P. P. ~
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements# Z {4 C, W ^2 }
of Solid-State Lighting Products1 c+ }: J, A7 U
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。, `+ E! b3 v, e, M) w! {, K
第二个是 79流明光效测试报告。LM79整灯的吧。
- k) o8 |% ^! vThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?$ i8 W5 d( s4 M
* w( E; E* j" Y* {2 KL70 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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9 z( S$ _4 z! H3 @( ]! DLM79, 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.% k5 a3 V9 {0 p) W
' U: J, c$ g6 NLM80, 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. u9 \8 M% i% R/ T* C
( F7 x' x0 m$ C, [( k1 \" J, rLM80 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.
) I& W: c' ?6 o4 U) rQ:寿命L-70是啥0 _2 O6 b/ P" d5 Q% S4 x
A:维持70%光通量的寿命
" R' _$ x7 y9 N2 e* D6 P0 \Q:谢谢。学到东西了% f! |1 h' q% Y, Z/ c
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
5 p. z7 U- n. m! D7 l5 pQ:明白了; i8 ~3 c6 l( Y5 D! I6 I
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发表于 2018-6-29 10:47:25
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