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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
    . }, @* J! I& A: t4 O- YIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    7 T8 M  q9 F  D+ I: i8 C$ x* P; gof Solid-State Lighting Products
    8 z' I2 g1 P; t7 H5 |+ K  pA: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。3 ^1 U5 Y- i) n# k& ^! s
    第二个是 79流明光效测试报告。LM79整灯的吧。
    7 x! j9 \: p* `, M+ L  s4 ~8 wThe LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?
    % k0 }0 Y0 _0 ^% E6 ~$ G% B" _& d; C+ e7 @' A' J4 T/ ^+ 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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    4 @0 B. ^  A# h3 [6 I7 tLM79, 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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    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.% |1 {4 V8 w, y/ I% C8 U8 m

    ( R8 E$ T) U! H. M" H4 `& o, _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 i1 F8 i7 N  k6 r7 k
    Q:寿命L-70是啥
      B5 n- f+ ]2 \  S! xA:维持70%光通量的寿命
    ( [* M! n# U$ D# PQ:谢谢。学到东西了
    2 d  F# t- B: HA: 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0 O  Y( s. X- J3 ^  p& n/ O7 E4 e
    Q:明白了+ m0 [6 D3 R- v  b2 Z% g
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