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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 }: O* ^; J, g
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements# X% ^( z: _! M( M8 k9 u$ G
of Solid-State Lighting Products/ _$ [' X4 t" p% k- @) Z+ }
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。
4 X8 s; R7 z H) T% n( i" z# j2 ?# r第二个是 79流明光效测试报告。LM79整灯的吧。 z, B$ e# G0 K& a' j' m0 d
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?1 b0 C2 C% T" G: `7 ~5 a0 h9 s7 t
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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).+ F. b; a2 e3 T, M
& c K: r0 l* i# E, u7 Y2 N1 j7 lLM79, 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.- h+ y3 V4 j7 Q. T# M: y
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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.1 y% h7 X5 k! E, M( J5 h
. [: d8 U% f) q6 k( ^! i3 ~& dLM80 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 A/ H( `( q, z9 v4 [Q:寿命L-70是啥7 e1 `* ]1 M( x' t) t `; x+ C
A:维持70%光通量的寿命
- a% N b, @0 U- z2 p; f! WQ:谢谢。学到东西了
$ o5 t0 W& I* E7 o. \7 Y6 q% sA: 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% i% d1 V/ y3 Q0 x
Q:明白了- g1 s+ J7 v. {' W4 `
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发表于 2018-6-29 10:47:25
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