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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
    / r  L$ [3 Z- j4 EIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    # X, O2 N$ t9 C5 w' W( ~of Solid-State Lighting Products% D$ V9 T- X0 w
    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。
    5 Y8 g" |& y; q& C1 k) T* I第二个是 79流明光效测试报告。LM79整灯的吧。
    - Z  k# N9 ~( F& i* W, b9 iThe LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?+ p/ S2 I8 z, _" P/ o+ i8 C

    5 w: Q/ t, H5 Z- s. F6 aL70 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).) l9 Q. M+ T# ^1 w7 W

    6 C  b3 d& x% m/ k. x9 S$ ~4 dLM79, 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.; Y8 Z' D- i# A+ R: ?$ ^/ Y

    . n. S: }! ~9 K1 |  qLM80, 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.
    / Y2 y8 L* c2 M% t  O6 Z* z6 `$ F5 Y% X. V
    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.3 W# {  M7 d* V# c+ c7 o
    Q:寿命L-70是啥
    ) @2 `! r$ q) K! z. S: _5 mA:维持70%光通量的寿命
    " \3 z+ }; C- ~% c, Y( W" DQ:谢谢。学到东西了
    , V) _% I# n0 m- o+ DA: 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
    $ B% U% x" \5 ~- G5 t& v4 z8 DQ:明白了) b* |) I8 n! ?% y
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