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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
; m3 n2 E; @. N2 ?' QIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements% J+ G( ?% ]( M5 m) z$ d+ ?6 ~4 U
of Solid-State Lighting Products; d# m# ]* A D8 s
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。
- l* q! x9 F- ?0 \第二个是 79流明光效测试报告。LM79整灯的吧。* ~4 B' q! {( u4 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?, L3 I8 n. f" K9 H
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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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4 s0 o1 D8 T2 V; _2 ]" jLM79, 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.
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8 A6 _* z w- b" j: i- v' s( k$ m T2 V) MLM80, 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.# J, M2 P. t+ L) L
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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.
8 ^8 K6 k% x6 D, qQ:寿命L-70是啥1 _6 I0 p3 k# s" l2 A
A:维持70%光通量的寿命* }; w/ [8 E; r- A" W7 d
Q:谢谢。学到东西了
9 b! d [' J3 FA: 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6 s) ?" d1 @) f: U7 _
Q:明白了
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发表于 2018-6-29 10:47:25
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