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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
; r' { |% V2 wIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements3 O5 Y$ ~0 X5 ^4 L) C& j
of Solid-State Lighting Products
0 `7 |: j: o' T' sA: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。/ h* m; a8 B8 q: e2 P
第二个是 79流明光效测试报告。LM79整灯的吧。! Q9 ~; D. W0 p6 p' Z9 t! U& \3 R
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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L70 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).+ x) N& n6 ~2 k! N' g9 x
& ?: |8 |+ J T8 p4 ^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.8 Q5 g( w, v2 m
6 f7 }6 H- R; yLM80, 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.' Q7 S9 a% g9 C9 L
Q:寿命L-70是啥 O+ b! V7 T# l) e# w3 ~- Q
A:维持70%光通量的寿命8 a% ~- k l* |$ z4 I+ o
Q:谢谢。学到东西了, }% a0 o7 N& L, n9 y
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* z$ y6 [0 h, y* F# r) R4 t
Q:明白了, E) a, k: K5 h0 x, }
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发表于 2018-6-29 10:47:25
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