|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
3 \6 a' x8 a: gIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
8 R* _+ ~4 _- i' D eof Solid-State Lighting Products
9 B9 T0 U7 c6 H# sA: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 m( Z9 \: [7 t( S, A
第二个是 79流明光效测试报告。LM79整灯的吧。+ r: C( L9 X* \8 h5 M) m
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 S- `2 o- y1 R2 q1 U
" D1 U: }% L {9 b7 ^' FL70 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).
6 P, }4 x, I' i1 ~+ Z( N- L6 ^1 [* k U2 _2 d7 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.2 p. g- m- a+ j% f* i! g
/ \7 R% [$ `1 v" R7 S8 F/ LLM80, 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.+ K' i3 Y! N- k' a9 O
! Z3 k0 |+ t0 ^
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.+ Q* l& |* T) V$ v% h5 K+ @
Q:寿命L-70是啥
: }! x, F6 a# K7 b& dA:维持70%光通量的寿命; l# p+ L1 F3 E4 o- K/ p
Q:谢谢。学到东西了
8 R: z, K& j* I! d+ aA: 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
( V2 F. U q) q0 z$ a |Q:明白了
! R; W0 l6 x) {- Z |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )