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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
" S4 T1 P% o* v3 Q# o. KIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements u- y& ?, y o6 S x
of Solid-State Lighting Products. U; ]3 J7 Q; f# b8 x
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。
4 Q8 \" n- R4 A y6 @/ K, e t第二个是 79流明光效测试报告。LM79整灯的吧。1 t+ }+ j J) ^. R& L7 K8 o
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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& E4 \$ X# r* VL70 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).4 Z3 z q, C( V
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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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6 C- a# T/ i3 \9 o, }$ F- x1 `" S7 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.9 U( T& {5 ?% w, z. d" G( b! }
8 ?' X; B$ a( y% bLM80 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.; k1 H5 B' x, v. v$ s8 e
Q:寿命L-70是啥+ t1 K/ T+ {& @( x1 B
A:维持70%光通量的寿命% H8 F( j) D, |1 f E- u5 L7 D
Q:谢谢。学到东西了 {" [& \( f* c @
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
3 B1 v$ c3 P, R: r. o. sQ:明白了
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发表于 2018-6-29 10:47:25
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