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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
' m6 A/ D' U" W( f# }IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
! P, W& E, e) R7 B+ `0 Cof Solid-State Lighting Products
7 ^. d8 f5 p$ |: NA: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。
- \( S# W. ~ V, }+ l9 k第二个是 79流明光效测试报告。LM79整灯的吧。+ y- W4 ~ f" B8 A/ m4 I4 x
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?& g x* m. b5 H$ R G$ F* ?* n
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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).. R$ ?3 H( X& k, a
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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.7 a, B7 G( J" ~& L- K& \, D
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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.
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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.) w2 n: p2 K0 m' F* h
Q:寿命L-70是啥1 v6 D o2 B* L0 u
A:维持70%光通量的寿命
: |2 v8 z- F5 P- jQ:谢谢。学到东西了) @0 s! `7 u$ h& T4 m) b5 R
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# W# x% u) I g: \/ ^( s
Q:明白了
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