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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% o. j/ J0 n2 n9 u' u/ ^
    IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    0 q4 v. u0 O) t5 |. m% x& d( Kof Solid-State Lighting Products
    + I8 {5 |) A+ Y, I7 F) H$ j6 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。8 Y* m. Y! b" W/ F
    第二个是 79流明光效测试报告。LM79整灯的吧。+ D& ^0 R& I' s2 B$ Y  b" d5 e
    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?  N/ Z6 i' ^8 E+ v; n: y; N( J
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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).) F2 D3 m9 O/ F7 r
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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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    6 r+ }1 O( J: Y. \1 T1 Y( |1 ZLM80, 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./ N3 v& }: k$ U; Z+ T4 J
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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.
    + a4 A2 z, x$ D4 a6 @; EQ:寿命L-70是啥$ E$ I2 @, \9 l4 T6 B/ `3 _. P
    A:维持70%光通量的寿命
    7 I( C- m" \3 P' {+ c  S. ^7 `Q:谢谢。学到东西了
    + N: F# O8 {1 E. p% y" PA: 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
    ) X: Q3 r/ `/ V' F5 RQ:明白了$ o3 F& _5 I5 R1 [
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