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
' t# O% c* @3 @! h# Q' o; vIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
$ K* }8 k) C7 c: E1 K' C+ b! M. Wof Solid-State Lighting Products
+ I$ V. r/ {# O1 Z, y; ^1 c7 NA: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。
( W4 x: O9 D: G3 R3 D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).
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LM79, 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.

+ x( h, }* {3 D- p/ ^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
  N% U0 \! [/ A" Z. a  SA:维持70%光通量的寿命
$ v8 @9 K- ]$ V' PQ:谢谢。学到东西了
3 Z( k3 `$ ~! [# A5 y* |" UA: 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
; Y! E. T! Y" I$ W; dQ:明白了