|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的7 E1 Y/ D: M- P h
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
$ W$ e# W; f0 |' A7 D9 lof Solid-State Lighting Products
( s3 ?: V& G4 {+ h, e/ | v6 JA: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。
* U- J f# S9 S" v; ^第二个是 79流明光效测试报告。LM79整灯的吧。; L. N* x) K4 P# {6 g" {3 |
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?
. M4 x# v. @, y9 |9 U, `$ p( K7 ?" `5 y( m
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).# s, ?/ d8 g- z, M7 p- u
5 S- Q4 ?; |* ]3 S( M4 Y, B
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.# d+ t' e" D1 C
# E! T% X3 q* ^, t( VLM80, 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.; G7 B2 e# X7 H3 U6 y: E! g
/ c+ O% g! R0 j- y% Z. Y# yLM80 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.
9 S2 G4 K% @ v( l2 xQ:寿命L-70是啥, o+ V2 L1 ~& _& U F p
A:维持70%光通量的寿命
$ A& l! u0 r b+ G6 a7 {0 SQ:谢谢。学到东西了' o4 O* W, j2 c7 O7 Z
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
$ |$ ~3 `. g2 i0 `7 C; R- BQ:明白了 d) D( {9 ?1 b5 V
|
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )