|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的7 x- U2 M5 w. _
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
# u1 Z" n. J6 Y( p) V) d* gof Solid-State Lighting Products; F& U) u# o+ _
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。3 n* R9 ^: j8 E/ y
第二个是 79流明光效测试报告。LM79整灯的吧。
9 a) E* n: a, L, L4 {; nThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?
0 g! k0 @) e7 [
/ Z- R" W3 `, W7 I* t2 a+ s9 [% ^; cL70 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).6 J! v6 t }1 `/ e$ n, B$ x' J8 _
9 R$ ?+ w! w) a9 t% l( f. F
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.
4 X; n, @; ?0 G6 a
5 o4 r1 K2 f" H( W, c& ]# WLM80, 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.+ B1 f2 r; v* y# T, u1 j
% A( q2 a2 q4 y; U S
LM80 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.! h( Q# d7 y2 t w0 F! _
Q:寿命L-70是啥
' u% F# s, [0 [1 @A:维持70%光通量的寿命
( m$ u1 s8 l! C) h0 @+ [; JQ:谢谢。学到东西了
2 G6 Y" V+ v, D' {! _/ F) {* QA: 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7 H8 {+ `) ]; L; F' m1 g( }
Q:明白了6 n' N* a7 Q8 A! G3 X
|
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )