|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
; n' v: P5 `2 uIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
l* o5 D, K9 F. ^5 w0 {of Solid-State Lighting Products
! j. i- ?# q. i2 u$ @ B4 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。
m, s: U: B( p# Y6 V9 U4 _" `第二个是 79流明光效测试报告。LM79整灯的吧。
6 M$ a2 ^2 A8 n! x, P5 k1 [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?- c7 k/ e: Q h( j
; D4 O; P" ` R p& 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).
" H0 B) t( ?' l8 g+ }
7 i; K) G8 h: b1 ^- E Q; x% WLM79, 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.4 C8 C- K8 y9 c' _/ {4 a: z
J& a q6 Y- ~: w3 `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.
/ q3 }: u* h7 [! X, B5 Z) M) R. I: Q4 D( V7 _+ J( g G
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., O- h! s6 ?+ M. @- E- g" M
Q:寿命L-70是啥9 a. }/ l" l7 q
A:维持70%光通量的寿命
5 |0 p% L- w6 p6 i, u0 dQ:谢谢。学到东西了
7 w( h6 ^; D; n2 ?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) l9 N2 ~( D" |) p! n0 N8 ^$ d
Q:明白了
/ z5 @2 w2 `' L |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )