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
5 [4 [6 p/ m6 zIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
+ A. o/ a+ \# q4 wof Solid-State Lighting Products
9 L9 r7 X& x) g. HA: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。
The LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?
2 a  l/ G  }. J, 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).
) a% a( C* }9 G( |: P+ m
9 g' i1 e# v7 k  }- [: Y$ ]. M! n( GLM79, 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.
  C, P/ X9 P2 _* e3 o$ T2 U8 l
+ v4 g  G$ r, ]. L. X$ y0 ZLM80, 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.

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.
) t2 ~$ A! g. Z; S: n/ B/ EQ:寿命L-70是啥
! m$ u# h7 \& i1 L( zA:维持70%光通量的寿命
Q:谢谢。学到东西了
( E" s# r8 R) \6 K9 j6 jA: 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
) b1 F; r) n* j. fQ:明白了