IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements

ledpan

Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
% Y, C, j9 r6 ]( i9 zIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
of Solid-State Lighting Products
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。
第二个是 79流明光效测试报告。LM79整灯的吧。
+ k+ G" c6 R8 y. N% F% V0 n" yThe LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?
# a7 Y! m4 q$ D% v$ S
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).

( l; E* [+ h* I. ], J7 l- u3 lLM79, 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.
( O" g) E- i) ^
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.
" X4 B) j; w$ h! k. g
0 [" P- \- g$ N7 k5 _8 x9 b; {- VLM80 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.
8 H& o$ k1 P5 H& S7 b* ^Q:寿命L-70是啥
A:维持70%光通量的寿命
Q:谢谢。学到东西了
! I( c/ Y3 R8 R2 n* OA: 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
Q:明白了
" m2 p# `1 R4 B' L, a