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
6 c# D- \5 }+ ]( ^8 f$ d8 l' c# \IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
. L3 B! A3 Q! C3 {of Solid-State Lighting Products
A: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。
- [' l/ T6 @8 M$ {# R$ ^& c第二个是 79流明光效测试报告。LM79整灯的吧。
/ T; w0 {% ]; E' s1 ]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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" l7 ~7 u; w0 i9 JL70 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.
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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.

& j& \0 Z# D) a$ ?9 u) ?0 nLM80 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.
) p9 H6 i; l. S0 q! _+ D9 c/ ZQ:寿命L-70是啥
% u6 }4 @0 K2 eA:维持70%光通量的寿命
' S& S- C: f# Q/ |7 |7 [9 \! vQ:谢谢。学到东西了
* j* q1 l; P9 Z5 U8 T) ^$ hA: 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
Q:明白了
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