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IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements

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    2026-3-2 07:19
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    发表于 2018-6-29 10:47:25 | 显示全部楼层 |阅读模式
    Q:各位大神,能帮我解释下这个吗,是LED路灯上面的
    . A$ ]+ O+ D3 W( e* }+ M: [- yIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    3 h) e( G# V: F. x  K( V& M: R6 ?of Solid-State Lighting Products/ M; p* N: `4 w
    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。  `8 G& h' _- H1 n% a5 G1 U
    第二个是 79流明光效测试报告。LM79整灯的吧。. F& {$ G. O) o0 v1 w5 I" t
    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?
    " @5 L4 r, ]' p
    8 D: @, \; \  g! [3 V  ^" UL70 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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    3 v& S! ~7 G& z* 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.
    - O' }4 K1 ~3 \* W+ q- r; U/ f: x" G7 A0 |$ i
    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.
    6 ^# }- E) L# h7 _4 u* Y. [7 i
    ) y; @% p# V) P0 ?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.
    ) _% }) |$ N. e, \Q:寿命L-70是啥
    8 |8 P4 R8 j: [. W+ XA:维持70%光通量的寿命: f- e7 T6 ?4 `
    Q:谢谢。学到东西了
    % {- @. r' S* tA: 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  l3 B9 l, o7 b" g. y( b
    Q:明白了
    ; {) A7 {' _' ?' R5 i
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