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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
    % ^# y" M" {2 _  mIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    # N3 r- ~2 p! }% Z/ @of Solid-State Lighting Products
    7 d6 y1 M; a- ?, hA: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。( ]* \1 {% A% Y
    第二个是 79流明光效测试报告。LM79整灯的吧。
    5 ^; G+ o- B8 X3 [% h% |. @$ CThe LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?
    ) d# P' M# X1 G1 L' Y4 {
    ) T9 Y3 W, i4 T) bL70 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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    # P) k& u: o% r. W9 b" x4 ULM79, 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.: j: f. D, {$ U6 u
    7 _; f$ f( ^6 H
    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.! h5 L4 x/ m& q3 M- f" O: B9 s1 f( ^
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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.- c5 c' x+ P- P1 |" L0 }& P0 Y9 x1 Q
    Q:寿命L-70是啥- A5 a& c  X6 \
    A:维持70%光通量的寿命( a3 N; M7 u5 m6 `8 R! y4 Y& \, P
    Q:谢谢。学到东西了
    " Y$ `7 O% i0 r  Y; ?' o3 zA: 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
    # V4 n0 I" h& k: k0 E" ~+ LQ:明白了
    ' H8 S& [' \$ {( R
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