|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的% o. j/ J0 n2 n9 u' u/ ^
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
0 q4 v. u0 O) t5 |. m% x& d( Kof Solid-State Lighting Products
+ I8 {5 |) A+ Y, I7 F) H$ j6 OA: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 Y* m. Y! b" W/ F
第二个是 79流明光效测试报告。LM79整灯的吧。+ D& ^0 R& I' s2 B$ Y b" d5 e
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? N/ Z6 i' ^8 E+ v; n: y; N( J
. c3 R4 S* k5 A
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).) F2 D3 m9 O/ F7 r
" ^# K! n* S) A4 W( m# X2 P
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 @: g: L% ~0 Y
6 r+ }1 O( J: Y. \1 T1 Y( |1 ZLM80, 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./ N3 v& }: k$ U; Z+ T4 J
. L4 j4 F5 V( U: R; l
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.
+ a4 A2 z, x$ D4 a6 @; EQ:寿命L-70是啥$ E$ I2 @, \9 l4 T6 B/ `3 _. P
A:维持70%光通量的寿命
7 I( C- m" \3 P' {+ c S. ^7 `Q:谢谢。学到东西了
+ N: F# O8 {1 E. p% y" PA: 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
) X: Q3 r/ `/ V' F5 RQ:明白了$ o3 F& _5 I5 R1 [
|
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )