|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的 P1 m1 A9 F' k; m6 `/ p& x% |
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
7 w$ X% N1 [, K( `! J% tof Solid-State Lighting Products
1 [ D+ C- r3 j( g4 z1 gA: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。) j5 h; W* \) b* A) J4 ^& B* E
第二个是 79流明光效测试报告。LM79整灯的吧。# Y- Y$ W* M6 a/ r. S, k
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?
7 \* D( O2 J( k' ~; g% N8 |, W9 E. `( F) v
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).# R( z" o$ N% g1 \; u5 \
- M" F& W2 l% }* V B" `/ ULM79, 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.
$ e2 j! P! ^( _ S
- v# [; F; K) C# R6 QLM80, 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.
" y) I# q2 h: e h7 @3 L$ v$ I7 f& M$ N; {8 l+ |8 ?, i
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" T8 E' i8 P1 J
Q:寿命L-70是啥* N7 ^" x& _; q( C
A:维持70%光通量的寿命
. \+ f8 f: I" x) ]: @ v$ {1 iQ:谢谢。学到东西了 T* C: K" Z/ M: E
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# d$ e" R$ H8 ~- \7 w
Q:明白了
! ^ ^: N6 q& Y" ?7 @, B |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )