|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的7 p/ N T0 F s7 k- X9 }, N& K1 A
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
+ v: t4 |5 N3 K) M8 l# xof Solid-State Lighting Products
1 l2 h/ w) } _; I! k& QA: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 i9 P! A$ V* u |! U! p2 G& U
第二个是 79流明光效测试报告。LM79整灯的吧。
3 y; W# F, W0 A; ~# N" c5 iThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?- W; W4 g0 z) c
; M5 o+ O# R ? C' q: VL70 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).
9 C u3 J( n$ t1 N& k7 c0 k0 U9 s% W' [9 h8 Y6 V5 g% z' Y2 }( E
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. Q, E. _0 W# @6 _
7 e8 B3 p, o5 ^! l8 o- Y U9 V
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./ Q% a7 g7 d- l% j/ e9 Y/ D
) v! ]3 W. O5 S2 r1 p7 Y. {/ ?, lLM80 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.
/ u# G( z7 U# I( ~0 UQ:寿命L-70是啥6 [: d7 L+ A3 P7 r4 t. ^( r P( x
A:维持70%光通量的寿命+ z: e" S2 a5 C* t: e9 z. n+ X |$ L6 K
Q:谢谢。学到东西了! P, ^& j8 [# B, i! b! L3 [6 o
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9 d" t9 e" o8 Z" H: r) K, \- G9 H& d
Q:明白了
- r" f: z, A2 T+ r. S4 \- o. s0 b |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )