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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7 _+ h3 z* r; t( ?6 G9 c+ n' z
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements1 p. t8 G3 ]" S4 o |
of Solid-State Lighting Products
7 E% {" l/ l" M1 H" LA: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。2 [ ]3 Q. y6 A. h
第二个是 79流明光效测试报告。LM79整灯的吧。
1 L: \# k8 I, h4 u" WThe 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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* U) d3 ^4 I4 E. X4 r# @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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9 x# V$ a/ L' wLM79, 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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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.. q* [: y) G4 ]" v- m+ N& V
6 M# @. V+ ], B5 Y0 ^2 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.
3 \! K3 Z6 q$ \Q:寿命L-70是啥' V" W; L" H. m |: s
A:维持70%光通量的寿命# T0 w2 `" u6 ~7 x1 t6 }1 u- N" Q
Q:谢谢。学到东西了
6 B/ V5 h% `1 q+ P9 B3 i! v0 PA: 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
9 i5 {& X( k" q% X+ a8 f5 _0 ~Q:明白了6 s+ ~1 X$ C* P5 x
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发表于 2018-6-29 10:47:25
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