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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9 j, s3 r7 Y& ~9 M! |5 a
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements) H' _! M) Q- q3 z) a# A, W; z4 f
of Solid-State Lighting Products2 E$ Y# G# N; u$ G1 y
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。& C0 {$ O! T7 v
第二个是 79流明光效测试报告。LM79整灯的吧。9 Z, V; b0 g' U! k1 r2 @
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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2 k% _7 t+ Q! x$ `, M5 ^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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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.. {; ?; x- E8 E; P/ K) s1 k
* W: R( j1 h- r+ X1 J3 PLM80 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.* C% E5 I( ` l1 h C8 Y* l+ A5 q
Q:寿命L-70是啥7 V" l: p# B0 i$ J0 z9 d9 l+ S/ t
A:维持70%光通量的寿命
" z) O3 O( m* yQ:谢谢。学到东西了
& y# O; c; ^9 L0 p9 I# J. `$ Y, j0 EA: 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
7 U% `! l! `9 U# I# `, AQ:明白了
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发表于 2018-6-29 10:47:25
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