|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
: V0 O/ c( i6 `6 v' z. g+ LIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
) x. b! l, ?8 G% j& U; K0 [of Solid-State Lighting Products2 p' _! z6 l7 j) c1 O1 @
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。- Y) @0 T3 h2 E+ J6 L- l+ M( p+ A/ L
第二个是 79流明光效测试报告。LM79整灯的吧。; P+ Z4 n! i9 c; q% `
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?
4 d0 @: _( v) A4 e, m/ X- v$ o% F, h% Z/ c9 j% \0 O: f) I
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).- C' E. X/ V6 E) S) [
; N( d5 X' l: u% o. {5 c
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.
* S$ ^( W. h+ e1 w% X# s: J S% i( ]2 \2 C
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.
- M5 O; [# `9 w+ B# ? m% x- X4 D8 z* N+ e3 ~; R
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.5 i& z, V* x) z7 }
Q:寿命L-70是啥. c# X! `3 h: E: V3 i) f& t2 ]
A:维持70%光通量的寿命$ C: m( G; i7 f2 ~- d# ?: q
Q:谢谢。学到东西了7 J' I) c0 Q) a' ]& A
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8 L! v9 n/ K2 x/ Q
Q:明白了$ Z/ W4 H. g% ~3 c* z3 G
|
|
<
发表于 2018-6-29 10:47:25
|LED盘
( 粤ICP备18067418号 )