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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
6 h ?2 h$ A8 d2 v% X* A2 dIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements) |9 p6 C* c( T8 `
of Solid-State Lighting Products: ^$ ]+ m2 S0 n5 Y/ ~, M
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 W4 {5 i6 ?% q3 L" I+ c
第二个是 79流明光效测试报告。LM79整灯的吧。9 r6 o/ I! ]$ c2 A' ~. [$ w3 H3 x
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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V5 _- f. t% lL70 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).& Z. n+ l" ?! { h
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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.
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) c/ J( ~, ~$ f8 Q0 \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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+ r9 {% r4 u7 [! NLM80 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., M( C- A. F; V. m
Q:寿命L-70是啥
/ v0 {3 `4 d9 Q Z) S: B4 YA:维持70%光通量的寿命! x M9 q4 u- m8 @: v' o0 a% z
Q:谢谢。学到东西了* i$ j- s; f. c' q/ C
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
0 \& B b: g" z' y' t1 J/ {Q:明白了6 _5 T S- `+ s7 y) n/ Y
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