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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+ H0 @1 k& @1 Q
    IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    # U6 l3 D4 v* ]of Solid-State Lighting Products4 O0 v, _. f# V" 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。
    / k& E5 L7 y+ S* `3 F% C! m第二个是 79流明光效测试报告。LM79整灯的吧。
    7 T5 ^. a4 R0 ^( W( [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?% E3 B" `  f5 J
    9 x+ o8 I2 t! _1 o, j3 w. \
    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)., P1 b' E8 O$ ^( l) e. n8 {5 Z# f
    8 p4 p$ Z1 q; z
    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.! V( Y) `0 i4 d- M! x

    1 B3 o  P! G9 O* {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.0 Z  j' @& H" u& b

    5 C/ j" T  l8 s6 ^& r; d- ~1 fLM80 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.
    9 M& q) {. _0 R3 u5 cQ:寿命L-70是啥! O5 D* [( m' k% W- n6 W$ f
    A:维持70%光通量的寿命5 w: K: C7 b. n
    Q:谢谢。学到东西了: @% g) J5 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
    % t! c5 I! o. m4 v" H' ~Q:明白了
    ; u4 a+ G6 z. H; C( S4 N
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