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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% E: F# J, `+ `+ ]* a" O
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 @1 W \3 Q$ F+ l" }4 C0 C
第二个是 79流明光效测试报告。LM79整灯的吧。5 c% p/ j3 o7 w
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?! a9 S5 r* J# L7 Q3 b: c
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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).- |9 O7 M' a7 p* Y: g
+ o* p9 b7 V1 D/ m% rLM79, 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.# {. I" R& l7 I1 f" M
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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.& V) U$ f T2 x# l+ W4 r& ~
Q:寿命L-70是啥
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Q:谢谢。学到东西了$ {0 r# m4 z9 M" i) `6 v; q# @& `
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2 q' g( d4 J" i8 g: t
Q:明白了, m$ C5 y" _ B: J6 _
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