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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+ Z" N. E+ W; q9 F' O5 }
    IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements: C. Q* g, I% t5 _. ?8 s
    of Solid-State Lighting Products
    # \, z! d3 p: n: E/ X6 _  v7 l: OA: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。. x. t6 q* f' T; K
    第二个是 79流明光效测试报告。LM79整灯的吧。
    0 g+ }- h) W7 \+ F* vThe LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?
    - y: A7 b) e9 g' N( b6 c5 {8 X' V$ d& ^. i' j$ z' c' m
    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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    ; T5 V& w% w) }8 k7 o! I+ W. 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.. x& G9 [7 K$ e1 M. W9 v
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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.2 z6 e" O0 ^  ]& G' V
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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.
    ( A0 F( c+ C! ], @" NQ:寿命L-70是啥
    $ E& P. k$ E& D& bA:维持70%光通量的寿命& Q8 F5 I+ s% M5 L
    Q:谢谢。学到东西了
    ! ^1 o6 k' E+ }: ^" 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
    ! C- I7 x& ^3 ^  z: f- LQ:明白了: F* y  \) b# V' u) b
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