|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的% Q- @ z3 d0 f$ X
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
$ K2 C* W- g$ _ p0 [of Solid-State Lighting Products1 L8 r/ d2 P( R8 X/ U4 s+ ~
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。
% X n; |+ i8 s5 q第二个是 79流明光效测试报告。LM79整灯的吧。
. Y; j$ r5 d. H9 X1 L9 qThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean? _. R; u6 A6 M! c
5 ~- F$ ?" [% C+ \7 o
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).7 f0 C5 \8 V% o3 r% u
" O, G& w. s* U0 c2 q) ]5 N
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.
/ A; u" u; O9 \, ?5 r0 I& K8 k- ]) H
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.5 u; w/ a* f% \ i9 e2 P6 \
6 N+ m* w+ o: H/ ^+ m k( rLM80 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.
! O7 \: z/ S9 Z8 O5 {Q:寿命L-70是啥3 `) h# Y4 Q& y! L) y
A:维持70%光通量的寿命5 p; k% o. Y) K) ~
Q:谢谢。学到东西了
. s8 }1 {$ F) O% v$ ~( zA: 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
. j2 Z+ y$ C8 ^2 _; y7 bQ:明白了
! ^+ y3 m9 L# ?, [" j+ h8 B+ J: q |
|
<
发表于 2018-6-29 10:47:25
|LED盘
( 粤ICP备18067418号 )