|
|
Q:各位大神，能帮我解释下这个吗，是LED路灯上面的& `& N5 y- O6 K/ }( w/ m
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements$ D, [" A" G3 ?4 P- j4 ]
of Solid-State Lighting Products) S* r; ~3 k& `( O; `: j
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。
$ M+ @1 o9 x. f3 p第二个是 79流明光效测试报告。LM79整灯的吧。
. Z* p# n* P2 j/ dThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?
) F; ?+ q/ @ L% J. U s. v o% l7 F' X& n: Y
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).0 p1 e& S; p7 f1 V# t8 A
9 U- s/ @7 f6 r7 E" A8 xLM79, 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.
! Z4 J* w3 p+ ?) J o" l% c7 q( ~, ]. B n+ R& |/ T% Y
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.
7 l) V# ]2 C% j: u9 Z3 N4 e9 M
4 V) B: H3 I0 x+ i' C" a2 DLM80 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.
# r& a2 Y( u; W2 h( z* PQ:寿命L-70是啥
7 k- x. u9 k7 q) c$ r, I2 R f( rA:维持70%光通量的寿命' L, B. \+ O7 n0 e: P4 Y3 @: [
Q:谢谢。学到东西了
! {+ o* k3 I1 d" p# {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( I8 @3 g" U; g/ k
Q:明白了
9 B$ ^* a# R3 p/ _- I% E |
|
发表于 2018-6-29 10:47:25
|手机版|LED盘
( 粤ICP备18067418号 )