|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
) D) T! a1 u) Z" n' e1 eIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
3 O6 l/ D; S5 Eof Solid-State Lighting Products
3 u* g* C5 r& xA: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。
8 W9 k" h( C- p第二个是 79流明光效测试报告。LM79整灯的吧。
9 x, \# p) y/ a0 ~% f r0 |7 V7 CThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?) G: i" D% n5 g! I; W' l+ O# }( N
/ b/ N2 U7 R- Z
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).
5 @, Q$ @- [: p$ m$ x! X+ ^ B* T4 P: h1 Y* n% l
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., N8 k5 m& r( j( b5 B
4 ^' G# n3 r( X' y2 s
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.# F* {) s. P- t" d+ P( [0 P
, \5 z+ Y4 h9 H" a$ c& P& R2 ?& ^( c1 kLM80 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.3 A9 i0 l& h; @1 `2 O# N5 s7 U
Q:寿命L-70是啥+ a4 N ~' F3 b+ Y* N! K/ F
A:维持70%光通量的寿命
+ C! u1 T2 f/ l, [9 z+ VQ:谢谢。学到东西了
/ x( n' Q' p' f6 lA: 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
" K& N* p) n. W0 W" Q& r& DQ:明白了
* X% Q7 q9 o0 X' q |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )