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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
    $ m6 `2 ?. F& e2 LIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements' @2 }: c1 i( {9 \5 a1 v: g
    of Solid-State Lighting Products5 n+ g& q, ]% }% N1 @
    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。/ \. u. n7 e; ^/ `" J) s. a* a
    第二个是 79流明光效测试报告。LM79整灯的吧。) G. a) p) R: k9 v; S" _
    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?! j3 t) O$ D0 A
    3 x, V/ @8 {$ e, m4 n
    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).5 Z3 N8 W/ A/ N! O$ K0 P) s

    & e2 C0 J: b# c7 {: QLM79, 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.- w0 p+ n7 Q8 a$ y

    / I2 s! r% A( w1 Z8 y& U; ALM80, 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.
    " H# S4 E5 U' M- W1 w) Z4 Q& p0 a0 d9 x$ y
    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.( m1 t' X2 ~( V1 I4 P1 m
    Q:寿命L-70是啥
    + Z2 I% r0 N2 j$ `6 \8 I4 {A:维持70%光通量的寿命
    ! d2 D% G4 B( t9 r) ?  NQ:谢谢。学到东西了
      Q8 _/ y: g! V3 q# [. \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; K. A" ~) {% c  {' M
    Q:明白了# g5 C, c2 x, w) O/ ~
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