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
# d$ ^7 N4 l2 x, a3 R( TIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
of Solid-State Lighting Products
! o' `" J$ h# P4 [. c7 QA: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?
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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).

4 c2 z+ f7 w5 P2 ?0 ]2 K: p0 A2 d; PLM79, 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.
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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.

, C- `, Q% c( T3 f" W3 mLM80 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.
( o; t5 @+ s1 _) k1 w$ o7 D- C0 eQ:寿命L-70是啥
A:维持70%光通量的寿命
  Q5 q7 q: \  ^0 Q: h4 I/ ]8 X4 CQ:谢谢。学到东西了
; ?; p1 J+ T  ~* e+ d+ K" qA: 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
- A$ F1 a% Q" DQ:明白了