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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
    8 y4 i: E$ I: ?! ^/ d: rIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements" K: A2 M2 B0 G9 I. d& D5 O/ p
    of Solid-State Lighting Products" O  G1 f2 }2 @
    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。. W7 d& Y6 Y+ J/ e) s4 \
    第二个是 79流明光效测试报告。LM79整灯的吧。
    ! R4 E; N" r. J4 w/ vThe LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?: c  i* E6 e% k- ]) {' y- e) u

    . g$ l( n8 E- X# N; \9 EL70 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.
    8 s0 Y* I# v. o) c3 `2 c% F0 Y: M( V+ m2 a$ e
    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.5 K5 Q& O7 P* _7 F
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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.
    8 L/ \% n5 s$ ?- _6 }; T2 n  }Q:寿命L-70是啥$ P9 s+ K3 O8 ~: J$ A- f
    A:维持70%光通量的寿命
    9 v' L# s2 Y9 S/ `2 WQ:谢谢。学到东西了- C) R7 s! j$ L
    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
    . A, ^- H0 u* P# nQ:明白了2 ]8 r! U7 Q, R: x& `+ E# {6 B" ~
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