|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
. i$ g- @# p9 p; e! i% hIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements0 B1 T* ~4 _7 B7 ]4 Q$ ~/ J
of Solid-State Lighting Products1 q5 A- p/ E* |0 c5 b3 q
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 o& S$ W/ O# J+ x
第二个是 79流明光效测试报告。LM79整灯的吧。
# d- r2 X0 T2 V( k, `; rThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?; l0 u; |1 T: [/ {, g( F
! s( A& w. n: K5 j9 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).
& t: H+ w4 s9 P* n4 M. U5 U
' n6 g, L" D8 JLM79, 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.
3 m K) o/ q, h' Q6 j1 v+ ]3 f& f; t/ y0 h
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.8 ^2 D* f/ I6 a4 J( m
3 J2 J4 ? p! @" @: 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.
: W4 z( l; s5 z/ {( ^" DQ:寿命L-70是啥5 E6 s0 M; @4 h- j) w- W2 ^
A:维持70%光通量的寿命# j$ [0 u: {9 f% K! m$ s
Q:谢谢。学到东西了
8 `. R7 b2 {* A+ ?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
) U, \* g4 X/ x8 u; _* i2 w% UQ:明白了/ a8 g) }+ u' e5 l9 v
|
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )