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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+ h8 V7 d% Y* O2 N1 p* Z& i" J
    IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    * Q7 ?, K/ S; p6 T0 J( R1 |of Solid-State Lighting Products
    " c+ R; v9 E& F0 MA: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( W  Z2 v* {! p6 f
    第二个是 79流明光效测试报告。LM79整灯的吧。8 H  a2 F7 q  R4 k* D" 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?
    5 y4 |4 g# Y! B- U5 ?/ l1 I7 c' L. ]! u1 F
    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).4 ?3 Y! ?( h; I7 M/ t* @" p" l/ T/ B

    ) Q  M0 P& K( k" J) X$ m8 H% m+ 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.
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    6 ^' }* f& H4 m7 Q3 B) ALM80, 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.$ U2 n% i, y7 b9 ^0 t
    + A5 [: k8 t8 v2 t" Z2 x! s
    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.+ m9 Y1 _; X1 [) [' b
    Q:寿命L-70是啥" Y7 t/ ]) W' Z: |0 v. P, f
    A:维持70%光通量的寿命3 |9 H3 {2 I: C- \+ n5 ^9 h
    Q:谢谢。学到东西了; r/ H; s7 l' P/ I
    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
    , ^+ C; s/ q- L! v2 Y. wQ:明白了
    , X# B6 k' K& p) U0 m3 g
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