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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" ]- R+ C) t n4 |" I' Q
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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' A) {# E( e$ ?( B5 }4 m" aA: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。
6 D$ X$ ~& g3 x5 J第二个是 79流明光效测试报告。LM79整灯的吧。, c [5 l/ R; t+ ]7 j& Q: |2 t
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?) i" N0 G) [1 X5 T0 S3 W. W0 ^- t
5 \3 h5 p' ]8 W1 q' E$ eL70 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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: r- [: n% C. n( z- XLM80, 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.' H d: y& A- o' ]
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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.! d' t. }5 ?* V! I' @
Q:寿命L-70是啥6 T: e8 k! d& B6 X+ R+ o
A:维持70%光通量的寿命' f$ \& g. s, T2 ^1 o$ e( c
Q:谢谢。学到东西了. k/ y, h8 ^- L, ~9 b+ d% k
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' t N: ^8 _, \: |, t* s) j5 t- x' p
Q:明白了& _# v& G; z+ D) w) P
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发表于 2018-6-29 10:47:25
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