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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
4 Y/ }# d- |0 f% B2 h1 NIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
0 g; E' S- {# h3 T* J" I# Vof Solid-State Lighting Products
* j( _. Z% ^7 U4 ?0 i( c' QA: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。. j$ E( O: h" D c" ^( k2 e; y2 Y$ |
第二个是 79流明光效测试报告。LM79整灯的吧。# q+ f5 D& ? j+ A! F K& v: q
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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t" g9 f; S+ OL70 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).7 i; N) @" Q- _8 _, b$ @
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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.7 ?% \$ E( B& f( B3 ~. W
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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.7 d; B$ G; D1 N; \# Q4 l! W
Q:寿命L-70是啥
) j$ z$ R5 `$ {A:维持70%光通量的寿命" s1 ~: C- A' t, h6 o3 H; h3 B
Q:谢谢。学到东西了$ o5 B% R2 t; m7 z+ N
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
4 w6 Y# F2 ]" y0 H& p# \- VQ:明白了
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发表于 2018-6-29 10:47:25
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