|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的$ r2 ?- } l& l8 A/ a% v
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
5 Y2 p& d2 D+ ^( E6 P2 B, Uof Solid-State Lighting Products
7 i, t' n! s2 \' m1 C- g* kA: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。
! {. y, w3 ^- T D) e) |4 x& s. J. C第二个是 79流明光效测试报告。LM79整灯的吧。1 \! N; T& K; t0 \9 k
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?9 E! ?8 j0 g$ m: }, r+ S" s0 C
4 x$ z/ E' V4 ?) U2 U; A6 hL70 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, S$ X9 X+ h- l6 @! M
# y# Y+ a& T# Y9 g* b* o/ o
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.$ H; `8 V9 ]% O$ q9 P+ M
% L8 a. E, F \: L4 h' p
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.8 s( \5 ^# t. [. W6 s1 {5 x
$ W6 {0 ~8 H- 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.0 ~: X7 p5 s* Y8 u
Q:寿命L-70是啥
( u1 `1 I$ B' J( P; ~8 _A:维持70%光通量的寿命
( {$ o( U: z9 m) O0 k! p) OQ:谢谢。学到东西了1 h( R1 ^; V1 m# v+ U/ I1 G
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5 B6 s) t, H+ v1 p: G5 J8 @# d7 X5 I- q
Q:明白了
. Z! D% R6 Y4 f2 f8 t |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )