|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的# |: c7 } l8 L' Y4 j( Z
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
! G7 H5 c' l. r+ X5 q8 c0 P5 |of Solid-State Lighting Products
6 [( S9 @7 {+ ~4 PA: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 l. Q+ b& w0 G X/ N第二个是 79流明光效测试报告。LM79整灯的吧。
0 R# I$ _/ k( x$ l4 @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?- M: V+ ?( b/ M, h
/ q7 L7 r) ~- p6 {7 P2 _, W
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).
8 H: ~# h$ O: D- c+ W3 {, K- L& t8 z
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.
* _' j0 M3 k$ d3 b
$ p l( H! Z, 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.5 O2 v7 H+ j0 i9 f& X% d7 D
& n9 }; p% R. a9 w! \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. n' ^/ Z/ b7 G9 D) V; T. ` Y
Q:寿命L-70是啥
5 x2 z1 d7 Q0 p5 W/ ]A:维持70%光通量的寿命
1 a* D3 Q- J- @& O; fQ:谢谢。学到东西了
" \: Q9 Q1 R$ a4 v0 N% N# j, SA: 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
6 k# W! u0 H8 V; `" n3 R* V4 Z$ _( ZQ:明白了7 g& o4 ?) M& ]. T( u! y, I' U
|
|
<
发表于 2018-6-29 10:47:25
|LED盘
( 粤ICP备18067418号 )