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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
    % d  T3 @! @' C( r1 FIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements& F: _2 Q( t4 a' W( p3 B
    of Solid-State Lighting Products
    ; u0 S! {( @& C% _+ c6 |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。
    2 B! b6 }2 Q* D第二个是 79流明光效测试报告。LM79整灯的吧。
    0 X0 [# C+ i3 i3 `+ |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?6 `5 i& a, w3 l$ x3 y
    / L$ O! q8 b3 c/ H9 X3 ~
    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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    $ S2 y* m' m# ?9 \7 q3 GLM79, 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.
    2 R" W8 m; P% z" y# T. e! ?' @; T1 }1 z
    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 I$ G: `1 K' n+ n

    ( K* L  @; [& j5 q' GLM80 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.. c4 s* M6 F5 ~6 R. i
    Q:寿命L-70是啥
    # n* _" ~* l7 L9 s1 gA:维持70%光通量的寿命" I. w6 s# x5 M. `" [
    Q:谢谢。学到东西了
    4 `( c) h. ?2 C' i/ FA: 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
    - X0 ]7 G) l1 p4 y( V; v+ OQ:明白了# S4 r+ L8 ?9 I. U2 Q
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