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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: l$ Z7 l8 ^4 `8 E! g
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements$ n4 |6 k: ?5 G' t9 _
of Solid-State Lighting Products
3 V1 W3 a9 U& Z) Q& ~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。
0 c1 g( e9 o4 S# G, Z$ `2 b- a第二个是 79流明光效测试报告。LM79整灯的吧。
& K5 { ^0 m, D6 F6 X# h* l$ j6 [% NThe 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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$ t: i0 }. Q- n+ i/ p3 dL70 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 N M/ `' {: \5 y2 f/ I+ h
R+ p4 K5 h2 q5 N2 n! w# jLM79, 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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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.0 v3 e( z( [# F. U6 c3 H3 M& C3 M
Q:寿命L-70是啥" @* d9 u/ o5 s+ _
A:维持70%光通量的寿命
0 K( N u* _! O" `! l! b1 [Q:谢谢。学到东西了3 r6 E, x4 a3 L$ T6 K t
A: 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
8 a [( d' o: k, L8 Y9 ?8 d- EQ:明白了
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发表于 2018-6-29 10:47:25
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