|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的! J" Z- e8 A1 A$ Q) f
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements9 M2 I% `. _) U6 `
of Solid-State Lighting Products) I" Q2 R9 X9 @2 {& K
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。
! P2 K3 B1 c$ p$ i第二个是 79流明光效测试报告。LM79整灯的吧。) C$ k/ l9 c+ `+ g
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?) S3 _, m3 F3 Z# h% L
; |9 F; l6 \! U5 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).
: f, K0 L7 u; u7 O: O* ?
, Q; Y9 V; V0 @1 L% pLM79, 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.. X8 P. ?; C( x8 Y5 R$ D: ~3 |
. z; R$ {) C* x/ P( {; _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.* d$ Y) Z d7 i( o
) ] w0 v6 V3 G% L
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.
& t$ D3 I6 ]& X3 D1 aQ:寿命L-70是啥
1 |1 u4 _1 L0 O2 v* iA:维持70%光通量的寿命' `( }9 H% c* e m0 Y
Q:谢谢。学到东西了
8 i" ~% ?& t$ F; i# a h7 xA: 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( n/ u7 K4 Z2 F: K5 i+ y
Q:明白了
3 x9 h. I" p- S5 n! h; S l |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )