|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的$ b$ a- E2 }7 W+ J" w
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements4 I5 p( `) @9 K/ E. u+ L q/ S% m0 a
of Solid-State Lighting Products
2 @! f1 i2 P: h$ v% |6 q& z4 ?, hA: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。- a* i; i: y+ v+ q, P$ g
第二个是 79流明光效测试报告。LM79整灯的吧。! Q9 B/ y/ x; d( S5 X$ ]! _5 T
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?3 a! T# N d5 Q! e
$ E' W+ p& b( e. f5 v! h0 m0 Z* g) R, jL70 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).9 S L& [% j# ^0 L, Q% L' H
2 Q( N2 X f/ o( n6 ?7 e' A
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.
1 a8 R7 j( p5 B6 a$ O5 ~, B# I' y2 [! ?# U2 K& ]3 n4 W* e
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.1 U$ N. i6 M8 ^8 g
9 J& U5 @2 b6 r5 c, c, i: l0 T
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.2 e2 H n8 b2 \4 H7 f" f0 _9 Q
Q:寿命L-70是啥
! h% g) ]" w4 y! `A:维持70%光通量的寿命- K3 I; n: F4 ]1 x7 R2 D
Q:谢谢。学到东西了
! _; i$ z0 m8 V; t3 rA: 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
: q% D: b/ J6 t, W- b. J+ r0 G/ K" `Q:明白了
; U. ~, O' c* Z2 ?: O7 L |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )