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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
' O/ ]+ }3 m% k* J' iIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
D5 X" o* H: w# O, J/ C* J* vof Solid-State Lighting Products
2 u1 i' G3 \; `* [& Q" s" eA: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。
+ t7 Z$ Q* d: k- d, F* q$ `% P第二个是 79流明光效测试报告。LM79整灯的吧。$ X7 k0 h8 Z+ {9 F
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?+ j# S4 S4 j' O5 a+ M. P# X$ D9 m9 g
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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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1 P0 Q. y2 M' w. X( x& s3 eLM79, 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.
6 U+ ]) o2 m- x/ A }( b6 t g* jQ:寿命L-70是啥
! w. V* \. q4 }2 GA:维持70%光通量的寿命! g6 x9 N! j- \, G: j
Q:谢谢。学到东西了) ]1 L# I8 u$ n: U8 ~
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
" u; Q; p" i* |' v, n+ }0 pQ:明白了
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发表于 2018-6-29 10:47:25
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