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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
) ]! V. A2 @: R NIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements% D0 g3 x4 k" [
of Solid-State Lighting Products+ d2 _9 X* U4 ]: C, O4 \1 K
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。) Z2 S5 u2 I. ]5 S4 ]( K/ B/ c
第二个是 79流明光效测试报告。LM79整灯的吧。
2 `( M# e9 P0 H$ m# 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?
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4 u- c8 A: e0 S1 L! }* e+ GL70 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).) B6 x" F; G ]7 _
+ g9 U7 Y, g6 x" P/ uLM79, 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.# G( M0 c- T0 N2 ]/ V- X
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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.
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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.$ y0 e+ G% g' C3 M
Q:寿命L-70是啥2 w' C$ N8 c7 c( G) q) D1 |
A:维持70%光通量的寿命5 `5 h3 T6 f0 G2 f) s. t
Q:谢谢。学到东西了, i: s9 O9 u/ K- G4 r( t
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
: G2 E; X3 s& Q {# DQ:明白了
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发表于 2018-6-29 10:47:25
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