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

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    2025-5-6 23:45
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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
    0 g# X' x6 w; D3 H% ?IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements0 r2 q& B0 j8 Q- q9 G7 E3 l% |" c
    of Solid-State Lighting Products3 \  m- |' u& I7 R5 @# ~& W7 W, S+ t
    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。
    + q! M6 [; p3 k8 z, G第二个是 79流明光效测试报告。LM79整灯的吧。/ g8 h: s" h8 i( `
    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?: C7 v3 h3 {! Z4 G: Y( S
    / y. y' L# E$ \1 t5 @" ~4 c
    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).$ ^8 H# [! Q% R* w
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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.3 `' P% [  `) X* f7 }& a# F! h6 L
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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.
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    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.
    $ W6 Z) b2 h/ ~4 h; {# p  DQ:寿命L-70是啥
    ! H) r( q9 M2 D! x8 R3 M4 |' OA:维持70%光通量的寿命
    0 Y7 ~# K: V/ sQ:谢谢。学到东西了
    ! x: A7 Q$ r$ ?# eA: 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9 A8 G8 \0 l3 y
    Q:明白了
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