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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
    " e* E: Q6 j. p% N$ m% I  w2 R1 X/ W, mIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    0 w: E) _' w% U% `1 @6 ^of Solid-State Lighting Products! e8 S" G# W, l7 {3 U1 ]2 s& D
    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。
    % Q1 B/ b' `, G+ O/ }+ l& E7 }7 n  k第二个是 79流明光效测试报告。LM79整灯的吧。
    % Y" Z8 e$ V# Z4 t' _. T2 s7 \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?) a* |3 O$ h% W# b5 d) V2 q& J

      {3 D+ k4 r1 vL70 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).
    6 r3 i/ n$ ^8 D6 ]( _1 C! t4 J: l) i) p- ~7 T$ p: R0 d4 a3 ?( Z! S- K+ ~
    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.
    - H( f) a& A1 t9 r# h( S. A5 V% L4 `) k( I( g% e+ N
    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.- {7 P6 H( B! `: W% U& W

    8 h, `5 e$ P1 C( s. m) qLM80 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.
    ! u1 H- B# s4 jQ:寿命L-70是啥
    1 d6 e% e  }5 zA:维持70%光通量的寿命
    8 \0 M! a% R2 [# n- _2 ?Q:谢谢。学到东西了
    , x  e7 g3 ^0 t# ^; C, vA: 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
    1 J, j8 c# j2 a* p: b( HQ:明白了
    9 F4 W/ I8 P( M# ?! v9 [
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