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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8 f: _0 G: s3 s3 e# } p, G _
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements+ z0 w7 R' l0 r/ ]
of Solid-State Lighting Products5 b! T( K3 h" w( X9 ^3 i' \3 ?
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 A7 J' m, K; b5 r
第二个是 79流明光效测试报告。LM79整灯的吧。
; @, J0 o1 R H1 }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?
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6 b+ Q* |. \7 i8 ?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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8 D* a; r5 S# TLM79, 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.( k$ G( e, o; ~" Q5 ?$ {
( C* b, i( S, x/ J6 c8 F" t1 tLM80, 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.7 E0 a$ O. g' n, H! J% P
. {" Q+ A! t2 V- R9 ELM80 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.: [2 L4 S4 C' Z% Z7 R0 k5 M
Q:寿命L-70是啥
* a6 \# H& h) Z# V6 A4 h, Q" y8 CA:维持70%光通量的寿命
! H4 C+ B. j; s* OQ:谢谢。学到东西了
+ X) Z! B5 }6 h( h" p" @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- m! P4 t, {9 D; E, X: s2 F2 I
Q:明白了7 X1 V l) C% ^+ _1 t
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发表于 2018-6-29 10:47:25
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