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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) [3 w7 m  K4 v4 n$ `. X
    IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    . @* {& ~. L5 V- \! S2 Bof Solid-State Lighting Products" L7 a* P# [3 B* 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。% h& I1 C. R% i. @
    第二个是 79流明光效测试报告。LM79整灯的吧。1 [' Z3 n" R0 T8 N; j/ ]8 c- L: `  g; w: 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?! [% h  n" C1 R+ _0 H3 U. |; [
    & n5 \" S/ V1 b' }, Q) u: D
    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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    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.
    1 C( ]+ H. v0 v2 U" F/ }  r* E. ~) O0 G( ?: J7 k& o
    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.. j. s3 z. G( H3 G5 F' R- @0 U

    ; M! d  G* K' u) B1 F  \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.
    2 D/ a6 c  T" i* cQ:寿命L-70是啥& N' E9 _* P, d; A  l6 c: j
    A:维持70%光通量的寿命9 E7 m6 }% W' |. @( J. N, N! p% k6 y
    Q:谢谢。学到东西了6 G0 A2 |* `, M2 V
    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
    4 M9 |7 k' D3 n, c3 `; VQ:明白了- o4 R3 Z8 z/ f1 X! Z3 ]2 z+ q) b
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