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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. [" Q" x9 h7 |4 ~; a0 P+ m
    IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    & s' b- z) d) pof Solid-State Lighting Products5 x& c1 u+ Y) p% W0 ]! u* W$ W# K4 u
    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。: e7 p7 C# i) ?
    第二个是 79流明光效测试报告。LM79整灯的吧。- R, z5 Y! |3 \! o2 d
    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?9 c4 z' s, I* c) l

    2 q5 x! G# x! y2 ML70 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 _# A# d* ^# J3 G# k/ ?6 S
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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.( G$ x& }# ~9 [4 S4 F$ K6 X
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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.# ]% q6 _( Y  `
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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.$ e7 X5 m! C+ o: T8 j# R0 A: {
    Q:寿命L-70是啥
    : ?( a' ^- b. ]. jA:维持70%光通量的寿命9 }6 T. l+ Q4 H- j: z$ p' ?
    Q:谢谢。学到东西了1 i$ O. o- |$ c; `1 k  }8 a
    A: 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
    # @' {8 }7 G+ H0 a. WQ:明白了
    8 u, A3 g! n% A3 V
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