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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
    " Z" j4 H3 n7 [7 JIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements8 T* f6 T& B5 f  S5 ^
    of Solid-State Lighting Products
    ' N! L; u7 q0 D+ z+ [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。
    : Z' i! f' D3 x2 U3 J! K第二个是 79流明光效测试报告。LM79整灯的吧。
    ' s5 ?+ `5 d7 L% G  ?8 RThe LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?
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    ) c5 I* \  O! \4 u. [- pL70 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).2 b- h9 q" W! w( {9 a
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    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.: Y% }' i4 P2 ^4 z/ T
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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.
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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.  }& k5 ]( \8 r
    Q:寿命L-70是啥
    % p& \+ U( o5 D' x7 P' J% O$ ?( SA:维持70%光通量的寿命9 u3 I  D( i. G# C1 G3 u
    Q:谢谢。学到东西了# P: G  d* Z4 X/ k0 }; }4 p3 b
    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5 B$ c( F: v8 e5 O; q
    Q:明白了
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