|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的6 k2 U! Z3 J8 w* S% H# I
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements* K3 g; J; ]' A2 E' A
of Solid-State Lighting Products( `9 y' D8 j( [, T6 I7 k3 y I
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。) F9 J: Y! L: Z4 W
第二个是 79流明光效测试报告。LM79整灯的吧。
/ Y1 E" {* |# U+ B% D, {+ wThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?
* f% J% L# H. n9 z! {
& k. [6 [& @) @: ^) i5 s7 F' h$ YL70 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).
. ?+ r6 F; F6 x
& ^) R% ?" u% G- ~8 MLM79, 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.
* N- @( z) |1 V4 W' k1 f, Z. s& V: @! [ c$ H4 b- r
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.& z* u# v, h% G7 \/ z( ?: p! v! l
: `, O" T1 q3 ]9 C( K3 Y% k, y
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 F B. P9 x; O% C7 ~6 LQ:寿命L-70是啥3 ~& S- J. D) B1 Q2 u7 E C
A:维持70%光通量的寿命
' N4 c" L9 r, AQ:谢谢。学到东西了
" M- y0 h0 ?+ pA: 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, O+ o0 W; e4 J) U
Q:明白了. Y9 V1 p; Q' z: i( {4 y
|
|
<
发表于 2018-6-29 10:47:25
|LED盘
( 粤ICP备18067418号 )