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
. @# ], `4 U, v4 j3 C  |; nIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
of Solid-State Lighting Products
; P  G, a0 N' i, g' F' YA: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。
- s+ P3 C" ]' C' h0 Z; ?第二个是 79流明光效测试报告。LM79整灯的吧。
  F+ O  u3 Y1 C& h- V, o' i8 \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).

. H8 l) x0 O4 B3 h5 DLM79, 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.

4 ?; \& `. z" P+ N9 s) V' HLM80, 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.
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  T. ]2 f" }- r% b; H( ALM80 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.
1 v- z8 m8 ^/ a0 y; v8 uQ:寿命L-70是啥
A:维持70%光通量的寿命
Q:谢谢。学到东西了
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
% i6 c, k" G8 p! q4 e4 {1 ^1 B6 tQ:明白了