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
1 C2 X3 c8 H. Z* \IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
$ i7 s. f2 q! B1 t' t) G2 cof Solid-State Lighting Products
( ?( _. o) o+ h6 P6 ]% UA: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。
+ r9 a/ d3 I9 z% G0 c5 \/ F% n3 x第二个是 79流明光效测试报告。LM79整灯的吧。
0 c* v5 k2 B1 m, u! [  u' NThe LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?

$ S. [' r  S$ h7 r5 ]. iL70 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).

& X  m; U( }) ILM79, 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.

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.

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.
Q:寿命L-70是啥
9 q  l$ c- d1 S+ W, \( K+ I! A) A% TA:维持70%光通量的寿命
Q:谢谢。学到东西了
6 I$ U* O# r! pA: 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
  S0 C! F% J. i! F0 EQ:明白了
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