|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的7 C5 C% E d9 L8 h
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
4 P$ X. b& b* k1 I Cof Solid-State Lighting Products( W* i* [' K* d5 |: W( r {7 M
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" Y2 V- J; G第二个是 79流明光效测试报告。LM79整灯的吧。' q0 U& A. V: h2 i' h% w+ l
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?4 Q1 F: R2 ^2 k4 A5 D
" @, n* P- V4 S( R& I
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).5 j7 j/ n: A% T" W6 t7 y
6 H) {) Y/ W+ y9 @9 o4 I
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.# i6 J) A' E2 V' G: B
4 |7 \& X6 Y: I' q( t" a, L% TLM80, 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.
% a5 _& H$ I. o, ?1 y R/ K. m; C' W2 {& \6 n# S
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.
3 V3 G& B4 O) @8 W' b1 i9 |% k& GQ:寿命L-70是啥
3 B5 A6 f- q( K0 W$ I. [" a. oA:维持70%光通量的寿命' ?: M/ M% r, p1 X: }
Q:谢谢。学到东西了4 C H; z6 a; B7 [: K* _' K5 E3 P! ^
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
, L$ Q: T/ w' X3 GQ:明白了
& d3 J m. b: q, X- U- O |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )