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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 B, q* W- k. T$ e! U: f" K
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements0 Y; N8 x' R) Y+ s8 |& b
of Solid-State Lighting Products
$ u/ f$ P! C- Z! a! \3 ?. w! sA: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。
, ?1 v) B, P7 r- ~% P8 r第二个是 79流明光效测试报告。LM79整灯的吧。* B- U- Q s. y; e% {& i
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?) T7 [* B/ u7 b
( O$ V0 ~ W4 ~/ J+ X/ q+ a) g. D oL70 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).8 y6 N5 ^3 y9 a. |+ ~& {6 H0 y
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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.
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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.
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# A d- g" W9 f5 Q$ I( VLM80 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.
! M$ m3 e% S( M) u' X' ~- u9 j$ zQ:寿命L-70是啥
' [. j. s) N2 [: f" z% }9 EA:维持70%光通量的寿命& ^7 F7 B7 i0 b* Y2 R) W. Q
Q:谢谢。学到东西了
9 [( J# R( [' T5 \7 K4 MA: 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
! i6 m& d9 l- }+ c QQ:明白了- l% D! I+ m$ Z
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发表于 2018-6-29 10:47:25
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