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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 ^; [9 j. K$ F3 t2 x, ^
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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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。) S2 O" I8 @5 R8 t# q
第二个是 79流明光效测试报告。LM79整灯的吧。
4 G3 M, e; _- v8 N- C: ^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?- o+ k6 s5 J2 Y i5 _
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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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. u2 a9 ]# g5 x w' ~: iLM79, 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." N7 |( s9 {1 S
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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.' a6 \5 S6 Y# ?% t
4 h6 `7 l! d5 RLM80 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.
1 ~" r/ ^# k2 y# d9 NQ:寿命L-70是啥
3 @+ k6 k* C; |A:维持70%光通量的寿命; q0 p6 @- S0 e+ s: s; V
Q:谢谢。学到东西了# Q7 y4 I! R( A" ^1 _
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$ B3 K6 }1 Z3 a
Q:明白了, U, ?2 ^ {* m0 ^
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