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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- z9 g5 v- [1 `1 X+ O. ^
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements) ?; M, ?9 S" p# ^) ]" _
of Solid-State Lighting Products
2 E3 k6 Y0 o! m" I" x/ t, m* Q5 fA: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。2 k8 |0 t% T+ b4 H# D
第二个是 79流明光效测试报告。LM79整灯的吧。" }" L( O2 D! X' t2 q( f
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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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).
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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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& \& G" y1 V H+ v5 iLM80, 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.8 w7 \8 D1 o, w8 @! g; L9 {
Q:寿命L-70是啥& c) |% Y: T# J- T& D# @
A:维持70%光通量的寿命; o, Z- j2 K; x p; Z. F8 E* Q
Q:谢谢。学到东西了7 ?- O& T/ x! j! ]
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
% P) _: f% k8 o; nQ:明白了
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发表于 2018-6-29 10:47:25
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