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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6 p; `0 `+ ?2 j. ~) a* A
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements' |" @% ?$ ~. ^; N3 {
of Solid-State Lighting Products
, ?+ S0 h2 o* Z& M4 \3 D( I/ gA: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。
% i+ o; X! ~) h% @( `5 U$ O2 J第二个是 79流明光效测试报告。LM79整灯的吧。2 v7 J. v- S$ c% ]
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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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)., c" x5 J. y1 n) t
1 x" m) e2 A5 k! k$ l# eLM79, 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.* R6 P9 r( f# J. _8 {1 t# V0 l
' o% ]2 U* } U' u" T6 FLM80, 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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% H1 l& N) p" S1 p0 MLM80 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.
: V5 ?. |* e' g/ kQ:寿命L-70是啥" ~) w7 _$ y. T! D5 Y! _$ A
A:维持70%光通量的寿命- O# e: D) Z! M( y" p
Q:谢谢。学到东西了
0 W/ C) n9 \9 b9 z; R+ z2 gA: 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$ u( Q: K/ U6 U
Q:明白了9 I# x. @9 Y6 Y6 y$ N6 V4 |
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发表于 2018-6-29 10:47:25
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