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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
7 \. U+ m: c) q, VIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
7 m; s9 S) V+ Aof Solid-State Lighting Products, ^: S6 G5 Y; @- B9 O3 p/ D, ~5 F
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。& Q% P; G+ u- X
第二个是 79流明光效测试报告。LM79整灯的吧。7 X9 N2 M+ z" r, t
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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% M& f! h+ G& y+ N' n3 s& ML70 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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0 @2 I# i8 Y7 {3 `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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% q1 P, f8 L; I 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.7 a9 W" x4 G2 `# o# n" z
Q:寿命L-70是啥% y. P# \2 C' k
A:维持70%光通量的寿命' k9 M3 ^# r) T; b+ V, c
Q:谢谢。学到东西了
5 p2 t( N1 U5 G6 l% IA: 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
+ m8 u' l' p! J) u. I: v8 \/ \% JQ:明白了
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发表于 2018-6-29 10:47:25
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