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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! [4 q k8 @$ x( `
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements' G: Y6 Z3 C# E' f* H7 c+ g
of Solid-State Lighting Products% \: F+ O' j+ V7 R
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。
, d7 v' N2 W7 Y8 s9 g6 E9 h( O6 m第二个是 79流明光效测试报告。LM79整灯的吧。1 y% I7 F* L8 s
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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; C2 L0 L/ V7 a& h5 I$ j6 \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).& I. | p* d2 `2 {! t8 k4 f
8 N3 g: |: S. j! w. MLM79, 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.( |- C! ^- z) |# n9 O2 {9 D( I! @$ ]
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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.) d: I' ` L6 t" P1 h
- Z# d# h2 `9 f/ d+ B$ KLM80 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.
+ ~' {0 i* w( J! }+ Z4 w& B* l; Z$ ?/ `Q:寿命L-70是啥( ^5 s4 l# f# d/ n! [7 b7 H7 D' z
A:维持70%光通量的寿命
) V. A! r0 s% F3 b/ b. y4 }% cQ:谢谢。学到东西了
9 [! G8 ?$ Z- G& eA: 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. b' r s, w, H; |% Y! z$ f
Q:明白了
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发表于 2018-6-29 10:47:25
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