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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: K/ [( j0 v$ x, l' E6 f& ]5 U1 H/ o
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。
. S8 j" J. v" z! w* G* b第二个是 79流明光效测试报告。LM79整灯的吧。
: X: T/ Z, }) ]! |, u$ HThe 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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# }. Q* O" b2 }, n/ k8 N+ 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).
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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. Z9 X" ? |: ` ?% n
+ G X5 s/ N% i! SLM80, 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.. Z$ G$ H6 J* m
; s3 U; X8 v: Z# z" A; n2 h2 zLM80 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.) W/ O& l6 p; A0 L. `! b; D
Q:寿命L-70是啥
; V' O& w3 k; m9 y3 sA:维持70%光通量的寿命
' I8 H3 A/ V4 _+ k8 MQ:谢谢。学到东西了
& x0 A) @; g, h/ rA: 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
/ z I. Y# F* CQ:明白了
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