|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的. Z2 J6 d$ u7 K; G" p# x
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements# |1 Z: v% u" ~9 ?& @7 l1 U$ O6 h9 v
of Solid-State Lighting Products
1 ]" n: M9 t! q" M; z- [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。2 T' ^' k7 {/ @6 J3 R; o$ c
第二个是 79流明光效测试报告。LM79整灯的吧。
3 E) C9 h) `6 u7 FThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?
P: [/ Y# i# @6 o5 ?6 N
$ v3 M$ H5 F- _& p- W5 {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).
! h6 L! X; a. b4 N1 o% S
, B( b7 f4 S( }7 Y6 XLM79, 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.
. [7 v& l8 z) c6 e; k/ V* k6 Y: O' O6 ~" B
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.! _0 y5 p# C0 ^& G) r
# P) A- _) T# h- @1 V
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. ]0 w3 H9 ]5 y( D
Q:寿命L-70是啥
" \4 i) ~4 |! F* U5 @A:维持70%光通量的寿命
1 U2 h2 Z% L- Y9 D% {' WQ:谢谢。学到东西了
. O7 z" C) e2 s# ^# y2 A! M: J+ vA: 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! ]: g1 m' |! X0 |
Q:明白了3 w. e; n* }8 N% D9 h
|
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )