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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/ O4 F5 ^" _5 H* d1 \5 D
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements' W n+ j! L4 d+ _* h. Y" k9 Q
of Solid-State Lighting Products* M2 n8 y+ e* q% Z9 a! z& G
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。
; J6 T1 S/ `/ L: A2 K第二个是 79流明光效测试报告。LM79整灯的吧。4 T0 A& O3 O0 s, d/ Z; d
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 R) W) A4 g. g! vL70 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.
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) c. y2 H: l% y# Q7 }8 o9 E- dLM80, 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./ r u* t8 E6 I: K- d+ Y
" \ k/ _7 T2 g$ @2 X% h6 @( nLM80 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 f5 X/ ]* ^! z8 {6 D2 t! \! KQ:寿命L-70是啥
% Q0 S. @. g6 d# t* G. d, vA:维持70%光通量的寿命
+ T( ^2 T/ ~- ^" P* i2 C( h' IQ:谢谢。学到东西了
" [9 a4 @% L* r% ~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& A' n; U6 _2 m% [7 b7 R0 G
Q:明白了& e2 M% k+ x: p' h# Z W ]: b, W
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发表于 2018-6-29 10:47:25
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