|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
9 p, y, O# P3 IIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
% s$ y# J, H8 d7 V7 Eof Solid-State Lighting Products
# w c( |2 ?5 I, |; iA: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。
! f& q* B2 d3 F" |第二个是 79流明光效测试报告。LM79整灯的吧。
& }9 X: D5 Q) G3 z: }4 R9 y% eThe 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. \9 Y$ S) v+ z+ I
' l" A$ x8 i" x$ z( f
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).5 V. t; S4 g4 a/ A' g8 |
j+ k& a( ?; K* R6 g2 @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.7 q% {1 I- {1 C
+ c, S$ r$ y5 f
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.
) R0 A7 N0 f4 ~7 g6 ]- u! u3 y; ^; u" W# u2 s! I2 c) M' S8 r1 O' k
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.
) w. i. j/ ?9 z2 w5 o6 n& HQ:寿命L-70是啥! q2 z: ?4 b; [9 x; K
A:维持70%光通量的寿命- }& ?/ z7 ?. ^ O
Q:谢谢。学到东西了" S- e1 z9 ]: ]8 Q1 O T+ s9 z
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2 H# ?4 K( P& N* Q
Q:明白了: \7 `9 X# L0 W3 J% g
|
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )