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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' U8 }% ]0 H- \; t- X, m/ U! @
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements% E. L. |, @: U; q
of Solid-State Lighting Products6 X9 e2 j2 l* s2 Z8 t1 k
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。
3 i) h& v% K' b. R% H& [( X+ }- y7 }第二个是 79流明光效测试报告。LM79整灯的吧。
' B \0 v9 [% L3 L7 b+ P& |+ sThe 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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! p1 U$ i( _. n. }2 X2 [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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! b8 }7 S: r9 L. U* S, K1 uLM80, 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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! q% j* ^7 b) l& v W! ALM80 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.% x% w; }7 C+ J5 R J$ e/ [
Q:寿命L-70是啥
! B4 H7 L5 x- _5 hA:维持70%光通量的寿命* w, W) y7 b2 N# @( A% B# P
Q:谢谢。学到东西了) C1 [$ b+ @/ ]/ E3 O
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
* f: W( h6 r7 FQ:明白了
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发表于 2018-6-29 10:47:25
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