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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# W( d ~, d1 I8 F; S+ s; z1 n
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
: }4 f& c$ ?) |8 W/ iof Solid-State Lighting Products
2 g- c/ w; n, c/ n/ M- ?- \: mA: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。) y: o& S: n; l+ q- M8 P6 v
第二个是 79流明光效测试报告。LM79整灯的吧。7 ~3 ^8 f4 _) Y6 E; ~1 i! M# C0 o3 U
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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( ?3 I. C* A( r1 JL70 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). r9 B: S8 m! C2 P
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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 k6 I/ p5 }$ l$ `. k1 R5 b
2 p2 e5 x' @' x, PLM80, 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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8 }+ J6 n$ X6 ?7 M8 W: XLM80 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.
: b6 M8 d, s# w1 w/ o. }! p" ?Q:寿命L-70是啥" Z1 {% F- p1 N
A:维持70%光通量的寿命
+ v# y' b! H4 i: A6 \Q:谢谢。学到东西了
9 H/ N3 [* W8 `0 \. YA: 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+ Y- L* x1 h& z: J- oQ:明白了
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发表于 2018-6-29 10:47:25
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