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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
1 a5 Q( [2 M S& J) RIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements/ k. y) B4 i% S7 @
of Solid-State Lighting Products; h2 `6 y2 l( ^0 l
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。5 M6 h* B8 D; @$ R
第二个是 79流明光效测试报告。LM79整灯的吧。/ {4 s% F$ o. ~" i/ U6 e
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 | W' J5 H1 h4 ]; _* QL70 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).( ] E9 h) D( k6 T6 T) w: [
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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.8 O/ d$ ]% b3 {# H+ d, d( X) `
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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.
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$ w! K8 ] z" C8 J5 _6 W7 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.6 T, t0 r- o' k( |
Q:寿命L-70是啥* o$ T1 D) |0 u' M: x# u
A:维持70%光通量的寿命
; i1 S, i# p& r7 y8 c: l! EQ:谢谢。学到东西了
4 X$ ^# D7 ]8 T" n) @4 Q6 D- Q/ }( AA: 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
* Q. r! d6 B! y FQ:明白了7 _" D: H- c( E
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发表于 2018-6-29 10:47:25
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