|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的+ M% B' Y: Z0 G
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements& l9 Z1 E& F. R0 z# Q
of Solid-State Lighting Products
* n/ ~- w6 }0 \& D' qA: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。
" F/ y( x4 _8 x0 q2 a第二个是 79流明光效测试报告。LM79整灯的吧。! z8 e! i3 m7 v: `& c/ F# C, B
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?
" S; p1 W. h' Y/ w( R. _1 L1 @# I- E1 c
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)., i: m5 }# {, v9 U% Q: g' _" a
" r, A$ w0 t D% C$ n; `. A. U
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.
0 u- d* H- W2 y
3 a3 u2 ~) V: s. p, R6 {. x3 F- 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.
: }# {0 P2 ^ X. v5 J0 y
2 h, u- K f: _. `2 |% w. c/ BLM80 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.1 N$ t7 h8 H7 }# A' a2 \' a# [) ]
Q:寿命L-70是啥
8 C+ r, [# M5 R3 Y1 {; u. c, sA:维持70%光通量的寿命2 ]) Q3 i& W, F8 S; w
Q:谢谢。学到东西了
$ M$ G* J' F& ?$ _0 TA: 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
. M- d) O. h( v- u3 c# |+ tQ:明白了
T, `+ K+ Z' R W% Z |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )