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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 v, a% h+ f( X9 G: U: e; x
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
# `% _, Q& H: z& ]# w( Vof Solid-State Lighting Products: ?- l8 E J6 Z7 _
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。( x/ W% G9 A$ J+ T4 j3 \- q
第二个是 79流明光效测试报告。LM79整灯的吧。. O3 P; |2 Y4 G/ _2 ^& z
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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% I' W" L3 R0 E4 B# h) HL70 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).! w7 e9 X5 K1 M6 K. g/ X; E
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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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0 e3 Q0 ?9 N7 J* L# h1 H0 [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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4 m) ?+ @: P$ u" A9 jLM80 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.7 D2 o: m; i) ]" M# [
Q:寿命L-70是啥4 B, c$ \# Y: W. J
A:维持70%光通量的寿命
: o# i. M/ P b" _$ RQ:谢谢。学到东西了
7 f6 S) ~: J" C5 u+ DA: 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
+ M2 G. ]! h/ l2 ]" ZQ:明白了3 Z4 G) R3 c0 c ~
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发表于 2018-6-29 10:47:25
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