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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4 m- H9 d& {5 H! Q5 m" B0 z
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
8 p8 A6 X5 C9 c* @4 D) k8 Pof Solid-State Lighting Products$ J( {7 q6 {+ Q4 l& c2 @
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。5 h# j& \5 B4 L0 e7 S- x
第二个是 79流明光效测试报告。LM79整灯的吧。& H( L V7 F q& H$ a
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?' c7 y A& R3 Z- V$ f0 ^) ?3 Y) U
" E! ]1 k1 V) ? qL70 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).5 U: e% D' P& R9 n; n
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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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4 f5 I* T) E) Z# LLM80, 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.) N0 R2 _7 s z4 j
- |# r; c" B0 V4 K) RLM80 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.
: ~" ~$ ]7 ^0 l' XQ:寿命L-70是啥3 _5 S! |9 A( h6 b$ z5 b- R
A:维持70%光通量的寿命+ v& |. Z$ s* [4 @% }4 u$ V
Q:谢谢。学到东西了
9 ?7 ^% |7 a8 j N. |+ D- v: U, 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
# L/ u G8 {) cQ:明白了0 v y$ P4 e9 T5 ~+ r
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发表于 2018-6-29 10:47:25
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