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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
# Y, t* P: m8 `IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements4 L# o n; L& k/ s" @; s' H. {4 v
of Solid-State Lighting Products7 h. f4 W0 O# @$ v3 g
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。
3 l* X, z9 ~1 w0 Y! h第二个是 79流明光效测试报告。LM79整灯的吧。
' ~6 q+ v( m1 a, O$ j! wThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?# H) N# a, U5 Z3 w
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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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: h- G: `: t0 `2 }) ~5 lLM79, 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.1 ]) L! C( Y7 D
, j J! T9 q, g' A. s) ALM80, 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.+ g F: V7 @9 S6 F
0 M. u8 `2 o2 F3 P- V& QLM80 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.
- j9 b1 F7 G6 }% T% \Q:寿命L-70是啥
: q# u1 Z! f# T a5 @! L) xA:维持70%光通量的寿命
0 j* D+ h* S' H; n4 a, rQ:谢谢。学到东西了
, h4 |1 Z! R& s! r) r* ^ G4 v) q8 oA: 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& m( F2 i5 c; u, \8 }' i8 L7 p" I
Q:明白了
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发表于 2018-6-29 10:47:25
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