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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
    5 L: h( s( K! q/ ?" SIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    ; {( e* f: t2 o& R& S+ D: j; n  a& Uof Solid-State Lighting Products
    " J; E* L4 P- F( {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。/ F2 V& H5 f+ F7 \: L
    第二个是 79流明光效测试报告。LM79整灯的吧。8 P$ F+ s6 [, H- }, m0 t; D- E
    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?
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    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).3 L; }' ~( B5 K: J8 s, t& Q9 l

    2 s* x: L! L; s2 z) y' kLM79, 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.0 t0 f( G' M8 Z
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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.
    ' c+ o5 Q7 N! m$ {7 o' ?Q:寿命L-70是啥
    . p4 D3 Z3 x7 p7 `$ |+ a0 q+ qA:维持70%光通量的寿命
    & E0 ~8 c" M9 i, b' GQ:谢谢。学到东西了! q0 n+ n$ G% d6 c& v4 P# `
    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
    2 O+ A  _3 x: `3 {5 b  j0 aQ:明白了- e2 [6 ^  Y- d" @6 {
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