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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% o& |" V/ z& w1 t
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
5 d+ c4 P. t. l6 Vof Solid-State Lighting Products
2 r2 W& l( e: R2 o* t) KA: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。 W+ B) D% q8 T
第二个是 79流明光效测试报告。LM79整灯的吧。
7 T" a7 N8 ? F: R" HThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?7 s: a! d t1 l- c
' o/ B( r8 h$ O* x: {2 QL70 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.+ w) H* y3 E0 _& N5 R
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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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) _0 V9 O) w. h! J7 `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.
, u$ W5 l! U) l( h8 e8 l' D& wQ:寿命L-70是啥
+ L( _ E% c/ G4 mA:维持70%光通量的寿命# z1 B1 G% o/ Z& k4 U! q
Q:谢谢。学到东西了7 o+ p; F7 U+ v& y# L4 H
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
$ W" U$ y6 X% tQ:明白了
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发表于 2018-6-29 10:47:25
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