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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
" p1 q3 V3 {1 o' ]IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements1 ~2 N$ u+ t. {" c. V: H' D
of Solid-State Lighting Products
f$ L4 ?5 |- e& TA: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。
% M3 x/ U( B6 ^第二个是 79流明光效测试报告。LM79整灯的吧。* W; u" ?; G/ K3 w) v0 X
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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% q$ V, e1 B, P. O& [: P' fL70 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./ ~9 T e/ x! r7 F
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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.6 W1 `: a J: K
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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.
5 ^! E2 d& N4 z4 i8 NQ:寿命L-70是啥: ?2 M4 S) I4 `% ~; W
A:维持70%光通量的寿命0 r% W, |7 z [" t& N2 ?
Q:谢谢。学到东西了
4 D- D2 V8 f) \- BA: 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
( O0 ]8 L* u, o5 {Q:明白了
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发表于 2018-6-29 10:47:25
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