|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
s! c' { h' YIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements+ y( h, {. u" v8 d0 Q- b8 R* W
of Solid-State Lighting Products d) ~8 O1 T+ j! H& `* r
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。
6 u6 s9 d1 Q+ f- s2 L' f% d第二个是 79流明光效测试报告。LM79整灯的吧。
% s- \9 ~6 \4 c- `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?
# B& M; L$ }+ Q! |, @& N1 t8 ]0 V6 B9 H" F5 \5 @9 U
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). N8 z7 v9 u/ o1 v0 g; _
" e4 z& v) o5 K/ e# r7 eLM79, 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.
( i/ K8 C# \' ]5 Z/ b: H
8 P4 w* p' Q9 T1 G1 j: X/ BLM80, 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.! z( B4 y4 O. w
+ |, o- C) {/ _7 tLM80 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.
; o3 S2 @6 l, t) W; Q: w" yQ:寿命L-70是啥/ Q3 p k) [( \, u1 O0 }, H
A:维持70%光通量的寿命
, r$ M1 X$ L$ t6 K! o( o7 zQ:谢谢。学到东西了1 J! q# b5 i$ V3 [% e8 Y% T
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( |" P8 {6 }' H5 Y& o
Q:明白了
: F& u( r2 S. k v! D |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )