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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$ q/ Z8 K( c, ~
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements6 G7 w' j$ h# M; J. s. I% f5 s
of Solid-State Lighting Products
3 o4 I( O8 [, Q1 c! GA: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。
/ f% F. Z; z, H第二个是 79流明光效测试报告。LM79整灯的吧。* n/ I! b4 a' Y7 n2 F5 l
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?3 p8 ]- ]" \+ ~8 v$ [
/ z/ D; J, ? j7 x. kL70 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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5 }/ C. s! l! Z/ I5 nLM79, 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." U+ }6 m/ @: L5 f' T
3 k! f2 H2 V8 @# r6 M% xLM80, 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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5 E J& | Z) m' x1 cLM80 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.
4 |4 @$ H/ w. v, }, _Q:寿命L-70是啥
: l8 D3 e* U- \ K, c" b5 [A:维持70%光通量的寿命( ^5 y% h4 k2 g1 x
Q:谢谢。学到东西了0 K- n. J% `( p9 e& E0 q+ t8 o
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* E, z' s! b5 F! q1 C+ T+ J6 z
Q:明白了
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