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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 L3 p, ^8 X4 U2 D/ R. m
    IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements: w+ }, v0 }4 d0 w# Q6 j0 N
    of Solid-State Lighting Products- A4 V! L/ Q: T5 Z! j
    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。
    7 }! Q1 L' J; u/ M$ t3 m; `第二个是 79流明光效测试报告。LM79整灯的吧。! @! J7 j2 G: q
    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?
    " M9 z& M7 W4 j. D! {  Z7 t; K: n5 X& h0 Q
    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).' B' I3 L$ G3 a; U" y! k

    / x( q) a( U# J4 Z1 I9 qLM79, 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.* N( _  b: O  F
    ( D8 R3 w2 p# V& e- i
    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.! b. x" [5 T  S( |, `

    * \& u- c9 x- A8 d, @- l0 B' PLM80 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 P1 {; d7 q  w6 ?  S3 n5 d5 p
    Q:寿命L-70是啥
    % y% k2 H8 U1 c3 A/ }, _9 x. uA:维持70%光通量的寿命7 A' f5 @0 u0 e) g. d, {' Q
    Q:谢谢。学到东西了
    * ?. h4 l6 ]1 f1 p" g) A" vA: 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
    ; d. o% H. e/ G# KQ:明白了
    ) l/ B  P1 L2 X  B) g
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