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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, |. Y: A+ H& w: }) K _
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements) g4 R- N& [8 I3 x
of Solid-State Lighting Products
7 Y* X2 e9 m8 V; {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。0 O; f# V2 X! H( S' i
第二个是 79流明光效测试报告。LM79整灯的吧。. F% t e' H( 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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( T( ^" f" D! T A* AL70 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.9 C e' S2 p- \( T, e
$ K: D7 E' D( D2 g4 v9 DLM80, 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.$ T9 c2 ^- ^! M) D) U% z3 a
' w" P; l. y& s) ?# nLM80 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.; Y- n3 K- r: c* T' }
Q:寿命L-70是啥3 _$ J% t9 v( w; o+ q& c6 H
A:维持70%光通量的寿命
; `! V* F- C5 bQ:谢谢。学到东西了) Z9 ]& z. b3 s" o- e
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 v' }0 d5 B- g. Q: R: P
Q:明白了
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发表于 2018-6-29 10:47:25
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