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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& d6 U3 Q+ v, r4 A) p! \# U5 f
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements) q! o$ u# i5 T; _3 m
of Solid-State Lighting Products
9 o2 u5 W$ d# C& O: PA: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。2 @7 I% g$ O8 T9 K0 \% S3 y
第二个是 79流明光效测试报告。LM79整灯的吧。0 ~6 ?6 `% M4 ?0 E/ F+ |
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?/ t2 D' s9 f: x& h0 J
; {- O6 x' v R; m6 I/ Y! L; KL70 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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4 @' t l" n' xLM79, 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.
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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.
1 r" O- V( ]& l- u. JQ:寿命L-70是啥1 r( J* {; e( O9 J4 |: B5 z
A:维持70%光通量的寿命
) b3 Q8 \5 z* q5 z- s( y, jQ:谢谢。学到东西了
9 y. [5 A( J: y2 nA: 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 b8 \" n r$ S& }$ v* o: W5 ?
Q:明白了, M$ F& V+ y& f6 E; I7 T! k+ _) Q
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发表于 2018-6-29 10:47:25
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