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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
" P) { ^& s/ Z5 M+ O2 }IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
9 E- x7 W" [; Vof Solid-State Lighting Products( B5 j2 q' ~, g% S( Q; V' V- Y
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。+ b7 r/ c* @; c6 F! G* Z \
第二个是 79流明光效测试报告。LM79整灯的吧。
/ h# K' [6 H% {- J+ r3 oThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?" o8 U& X- V, `! v# d# G
, H* T! u; l& m8 C" b* j9 Q6 IL70 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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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.5 E8 u( y0 a) n$ E) I2 u6 L
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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.$ A( [2 R% X. c
Q:寿命L-70是啥1 z1 ]" K. w2 ~* k3 _
A:维持70%光通量的寿命
' Q. c1 e4 u& r/ M0 x2 ^Q:谢谢。学到东西了1 T' f+ W# t+ J# F, D
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7 I3 Y5 w/ x3 G! E
Q:明白了9 O6 {* g4 a5 g8 h2 S
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发表于 2018-6-29 10:47:25
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