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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0 S# X! T" d6 x |- E/ K
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。5 D7 g4 f: Q0 R8 A/ X" q
第二个是 79流明光效测试报告。LM79整灯的吧。' E d Z7 @7 g& ]- V) V) s3 Z
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). d1 b! x, `+ B+ c; E3 V
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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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; b2 ?* h8 {" x9 e7 Z% O0 u2 tLM80, 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." @. `7 T# v# l
. C" h0 ?$ v9 a& L7 I$ `# N1 \! ?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.* e) m! k$ J( x% Q/ n% v" G
Q:寿命L-70是啥& C$ |% P9 w' U2 X$ h/ r
A:维持70%光通量的寿命& R* x' i$ d! R2 x* Y9 `+ y) S3 b: j- G
Q:谢谢。学到东西了- P6 a( }' c3 L4 Q, f1 C9 J6 z
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6 v5 i& x3 }( f% Q( X9 |3 q
Q:明白了
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发表于 2018-6-29 10:47:25
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