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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+ i) k, ~9 d' ~& L' b0 j0 r
IESNA 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。
" o2 V4 U& i8 ?9 R, |' K第二个是 79流明光效测试报告。LM79整灯的吧。3 D5 ~* t4 C5 v) a2 q
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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5 p! F% m1 S2 T) Y' ?% u3 L3 U5 C2 {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).9 |2 P5 a! Q. D( A
" G. D* W- Y$ ^/ ~% }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.' l9 I; I! z" T; y
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LM80 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.
& c1 D _& d4 OQ:寿命L-70是啥% Z8 c' p+ T, ?
A:维持70%光通量的寿命
/ a# t, G ~# |% u& RQ:谢谢。学到东西了
7 K$ x' E" X& ?0 A# z b; wA: 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
* o7 v) `9 W3 _% q* HQ:明白了
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发表于 2018-6-29 10:47:25
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