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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
% Z6 t8 c/ H% N2 w. W6 S9 n: aIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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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, D. d n6 n j4 Q第二个是 79流明光效测试报告。LM79整灯的吧。
~; O. S# g* R* IThe 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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3 c6 [8 Q/ c9 ~& d: J! D- |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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' I" ~. v* B1 |3 A* [6 [' }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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& @; h( s2 |( H; ?& PLM80 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.$ Y2 n: P5 G- t
Q:寿命L-70是啥
( H0 f7 ?# ^/ d" b: L. GA:维持70%光通量的寿命; J& X/ @& n4 N# d! g- ~
Q:谢谢。学到东西了
% M" b9 d0 n! f' ~( t% LA: 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' ^/ y) u0 Y6 ~6 I6 u$ q+ d
Q:明白了
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发表于 2018-6-29 10:47:25
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