|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
) \& K/ g8 Y+ sIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements. J9 {2 Z+ }; K0 r$ s- n
of Solid-State Lighting Products: q* e: Z! e& g$ j3 X' `
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。& ^2 R7 z4 p: }4 V0 B. R$ A
第二个是 79流明光效测试报告。LM79整灯的吧。. k& o& b- E/ Y2 h. v
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?* @5 \7 b4 Y Q
+ q9 p& F1 m6 g% a2 r+ y. QL70 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).
) l9 r! `' B& \. L6 `* }5 ?
" `9 W; i5 b9 C0 fLM79, 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.
* y) e2 m: t! C+ {) G3 C0 Z! i/ |* h1 S) s7 R# y2 K
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.6 Q5 e, G! y! v a
2 ]1 H" I) p. D! XLM80 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( S5 l# G) c6 g; Q3 PQ:寿命L-70是啥2 @$ H2 N/ N) ?* u7 s. T2 y
A:维持70%光通量的寿命0 ^9 x, Y" v0 z; P( B- g) z
Q:谢谢。学到东西了1 u. q( H7 l B& x, @) ~6 E& d& x
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3 P4 E% }, W5 `- Z
Q:明白了
6 L0 c/ r; |) O% \5 s0 _7 {; ]5 o |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )