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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# a1 h) Z) n `: U% j
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements. {, z- }# U I) U' ^
of Solid-State Lighting Products
: b% X8 @* K- g' R% G5 e6 X6 ^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。
8 d* s( M6 C( I9 f3 c5 r+ G7 r7 y第二个是 79流明光效测试报告。LM79整灯的吧。9 C2 z* n# }2 ?% z2 H
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).
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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.6 c# S. R1 S6 r8 Z# F9 Z9 [( n
6 ` z$ B: l# y8 o+ _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.' h! Q8 Y! Y) r( r# B
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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.
* U) e) ~) u( _" dQ:寿命L-70是啥6 C0 H$ P0 ?+ P) j# c0 X
A:维持70%光通量的寿命
K: s: O: I8 t0 o w* a5 ?Q:谢谢。学到东西了5 P* h: y1 l ` 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 L Y/ D& J# p) u% i. h
Q:明白了3 w( N% w5 J+ K: o
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发表于 2018-6-29 10:47:25
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