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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# |3 @5 d9 v4 O4 K
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
3 p4 \: D j0 nof Solid-State Lighting Products5 t3 o( o) \% x7 Y5 t! s7 ]
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。
3 _3 r$ G, ^5 c" n/ ~4 p+ | H0 j第二个是 79流明光效测试报告。LM79整灯的吧。% w/ ^' | H4 Q3 J v
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?+ W0 [% A8 U, m/ W( `
- e/ N. n8 ~- G: ^0 IL70 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)./ j( H! w8 \9 y7 @3 @' l* S
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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.* D+ w I( h3 t& j B1 F& y) C
9 t, D! @4 P) P0 b' S; uLM80, 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.# A9 Z. y. }2 z9 z
" n- G, |: N! O9 m7 K8 T( ~7 @7 X. GLM80 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.) E" @0 p# v v6 h& x1 A2 z
Q:寿命L-70是啥0 h9 {; r$ f* [' Z& m
A:维持70%光通量的寿命
+ r ^! U, g) _" [Q:谢谢。学到东西了
; V+ R+ f; a. o* E8 p" C0 d8 {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 D) O* ^& W! s: e- ] J0 e( o: n7 J
Q:明白了7 @) {0 G d0 N2 ?0 R$ f' C2 I
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发表于 2018-6-29 10:47:25
|LED盘
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