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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) T/ a1 L( x, ^ \ T
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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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。1 a; n+ |6 [; e( k( U% V% H
第二个是 79流明光效测试报告。LM79整灯的吧。" o! \1 V! N5 y3 u6 e( j- @
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?3 k% i1 P7 ~' ?/ g% q' C
6 l' N! ^" ~. jL70 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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5 l* d3 A! v! {) L# t* G9 M' L4 P/ b$ ?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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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.% Z$ ?* s8 n* F F* d; B
! M' i8 ^; x% t7 C9 s6 t7 {2 jLM80 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.
& \- ^: h s8 u9 {# CQ:寿命L-70是啥
2 V) |# g7 n3 H ?+ d# R6 PA:维持70%光通量的寿命
, _; F& I! I) N9 Q4 BQ:谢谢。学到东西了
* E# }7 e0 T D9 D( m8 A s7 z' HA: 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3 M' T# o5 [7 k% |' {
Q:明白了
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发表于 2018-6-29 10:47:25
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