|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
9 x+ y, C" W- @IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
, i, p$ V3 Y5 }4 Zof Solid-State Lighting Products
. l- x' k2 S& z( p. O0 C! A. FA: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。: G) G9 F z% W$ v' s
第二个是 79流明光效测试报告。LM79整灯的吧。
; |$ `. P2 s8 Y2 Y: o. j: ]$ xThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean? X P: A0 [! a5 L u$ x( |: e
/ s4 _! G, _2 }" n% \) ~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% m0 Z" \& B- W, y8 Y5 K/ M9 J" n+ S5 z# g. f
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.
* \) r8 n- D9 ?" l+ _/ V( c7 B. |0 [$ ]5 L$ d+ l4 I: x9 s
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.
D8 y' r/ I7 T* q2 w# Z3 d& ?; r8 \$ W' ^# x$ `
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.! C5 E, n4 _9 Z d; @
Q:寿命L-70是啥
7 v/ x4 {' h# K) {/ u! X6 U1 R _A:维持70%光通量的寿命
" h4 l) p# g$ k& @: F' k# l9 PQ:谢谢。学到东西了
5 d3 ?# N( t7 R+ b, s dA: 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
( M. U" q: q' D+ bQ:明白了+ P8 G$ m( G& p% }
|
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )