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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
    ; H0 X( \. Q7 lIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements- ?5 M+ D, x# s* V
    of Solid-State Lighting Products
    0 _1 P' C; S' H& D: u' n2 V! QA: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 @* X5 X; k% W9 z第二个是 79流明光效测试报告。LM79整灯的吧。
    % P. e9 Q/ B8 g! h, u& PThe LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?
    ! @$ `* O6 j% U, V9 f( q
    ' `3 H* f8 `6 [4 Z( h; HL70 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).
    ' A" U: E! k6 D$ G6 h, l: X- n. G/ m# @% z5 d1 W" ~9 H! e& d
    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.7 V2 r! `1 _" {0 f# F: X: G

    9 z9 ]4 Q6 y# R. ~9 k8 y( c6 @; ULM80, 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.4 I5 ^( O: O+ Z
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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.
    8 J2 p. ~/ G1 s  V0 S$ vQ:寿命L-70是啥9 C/ Q, \% Q2 B* b
    A:维持70%光通量的寿命
    + \+ V( M7 i- J' @" wQ:谢谢。学到东西了
    . s% q; X# N% l0 Z  c& wA: 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3 q! E* y2 C0 R8 k1 r+ j4 u" Z
    Q:明白了
    1 |; `4 A8 j$ x
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