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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
5 a- ]5 p* v' b/ V8 rIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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+ d' U6 ]# E, ^7 lA: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。& f2 w( n& \9 {, l
第二个是 79流明光效测试报告。LM79整灯的吧。0 r5 u$ r5 |# f4 E! r% |
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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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).
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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.1 a2 I) ~" y' J
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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.* y" |, e. q% L0 X0 ~! w
" k; {* X5 n; v+ J% L- \0 cLM80 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.( o- P- K9 E* R+ H
Q:寿命L-70是啥
' ?: R, o) j0 M( ~+ \% @0 QA:维持70%光通量的寿命, V6 r* y& ?5 y) v5 r
Q:谢谢。学到东西了
3 z& V& n% v1 x% SA: 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% m" X0 ?) c# k# }1 H' T1 c
Q:明白了
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