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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
    / O: |! K( w# Z9 ?* YIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    9 M! F& A6 N7 l- D) @6 Vof Solid-State Lighting Products; h7 ]: i* p0 r# B: y! J- v
    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。: Q* B) i- K' D: S6 ~9 f+ z
    第二个是 79流明光效测试报告。LM79整灯的吧。% E3 Q# Q; V2 k$ `, A' y
    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?! o2 y1 y3 q4 `  p+ d) l1 Q

    % ]! L5 R9 D: W- v# G* ML70 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).7 m+ [' ^# f, E0 U
    5 t3 }) {& P7 L" u5 @) X* U
    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.- M* a4 J! O; r: @/ r% N% S( ?
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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.* [9 h# B/ q$ \! L, k: V

    + u5 I) _" A. j: BLM80 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.1 ]' B  g& _4 ?5 i7 b
    Q:寿命L-70是啥
    0 k# ?% L" K, p" ^; i: m2 N0 tA:维持70%光通量的寿命5 G7 {( t+ g* r8 z, y9 G% @
    Q:谢谢。学到东西了
    8 H/ K' H' f- xA: 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
    ) ]. S% N5 m4 p; m6 N, |$ d$ S/ VQ:明白了3 ?2 n& V& [. d# C$ K5 \# \% v
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