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IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements

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    2025-5-6 23:45
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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4 n" u* C! `7 }* A  ]9 O9 P
    IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements) z' E  E% ]4 j6 D( ?
    of Solid-State Lighting Products0 `/ t6 Q" P, h  J! a3 F3 e5 |
    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。
    + o  v; x4 X9 U; f- V第二个是 79流明光效测试报告。LM79整灯的吧。  w. Y; ~) I+ C1 l: c1 o# @+ g
    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?+ f& ]. z9 L3 K6 G
    ; W* U4 X# M* b* c4 ]( ?
    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).
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    6 e; t9 I6 M8 h6 dLM79, 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.4 C% W" X8 ]6 B/ w) k
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    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.  ]+ G; j, k% T& F* e) y
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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.! e! F8 \6 i* C' v+ U& r  _) m1 f
    Q:寿命L-70是啥. c/ h  ^9 r. _' q( |
    A:维持70%光通量的寿命* E0 y- H5 M4 r( k- x
    Q:谢谢。学到东西了
    # c& r% @# X3 \: t7 h& U. ^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
    # h  j2 o6 {: I/ \Q:明白了
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