|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的+ [3 K8 [; x' q
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements" Y' g4 m4 s& o9 X) `' n# F
of Solid-State Lighting Products
+ r5 M: |/ s7 N% ZA: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。: [9 d6 C, U* |* ?7 H# w
第二个是 79流明光效测试报告。LM79整灯的吧。
& F; X5 {" b1 W2 C/ H8 R {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?
0 {9 g+ f& C! [7 M. y ?
# ?. {' h+ ]5 I* L5 l3 wL70 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).- X" R+ }' U6 }6 V0 B
1 ^& s: ~0 i- HLM79, 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.
% [7 g& o' x G& H: b% p8 }/ ~' V$ m2 J' n, d7 F
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." O8 t5 I T1 {% h2 n
3 E; h! g7 V. C; j e: [
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.
& I- m/ F5 [6 `* t: c9 O3 zQ:寿命L-70是啥% ?; b- G8 {0 K; S; g8 f* B% M8 V
A:维持70%光通量的寿命
+ _4 }! Z0 q" v+ F. d! wQ:谢谢。学到东西了 H6 r v- p& w; N2 @) Q% @
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
% j' Q* z2 B+ R8 ~9 bQ:明白了
4 Q2 ]! V6 D: O* F& z3 A+ p0 m% w |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )