|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
7 O: e; s& l$ m9 n% o2 OIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements# Z: @9 {7 r' H' S
of Solid-State Lighting Products
O" z* J* i0 e* o! B- V2 `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。5 o8 @ |, B; ~# G1 o
第二个是 79流明光效测试报告。LM79整灯的吧。4 ^: ~# p$ }9 Y! s* I/ O: U/ ]) f! F
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?
0 x& N% i. w9 N, I+ F8 b/ P# ?/ r, b6 t6 l8 C' J$ K( x; h
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).- g G+ {$ R* g) ]' T
5 `! F8 t+ C" a$ e5 ~# GLM79, 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.
0 k9 p0 P/ |. ~; {0 ~: B+ [( z& h
# F" U% d% w: P" e qLM80, 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.
4 [ Y7 u# O4 W9 O6 w7 w. H8 J0 U# Y. R6 ^2 j
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.( v9 ]# \# v, e4 p5 X! r0 U- V
Q:寿命L-70是啥# W5 [. T, w: w1 Z9 T, Z
A:维持70%光通量的寿命
; Y8 Z; z5 h* V) A( CQ:谢谢。学到东西了3 T% m. Y, T+ @/ g! T. ?3 R
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
6 L N R( u% _/ f6 h' uQ:明白了! f1 Z! M0 O# V% `) [
|
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )