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IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements

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    2025-5-6 23:45
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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
    : V0 J( x/ z; J" z9 |7 IIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    9 @5 y2 l5 O; l( b4 Wof Solid-State Lighting Products1 \  [2 S5 V2 c7 _
    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。( Q( @  ]8 B, [. B# x6 U
    第二个是 79流明光效测试报告。LM79整灯的吧。
    * \8 A$ Y$ X3 h; m5 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?  @" b2 A/ j, V- W4 R

    , s4 w2 c" i, N( e1 g9 d# JL70 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).+ h( `8 Q* D1 ~& Z

    8 I: R9 D8 E; d6 {) [" e3 ULM79, 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.
    * e1 F. Y: w2 b* a3 {) j" U8 J% P& o" D( G. D
    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.
    9 c' K9 m4 Q1 q$ v
    7 k# s/ D! d, G( O% o1 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.
    9 `& L: Y( |, {$ q4 `1 ~4 O: gQ:寿命L-70是啥5 T9 V2 q0 b+ ~9 Q- M& N
    A:维持70%光通量的寿命0 C% f/ _: R. F, Q8 m
    Q:谢谢。学到东西了
    # c, s3 Q5 _) f8 R1 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
    1 q8 J( Z4 ~$ Z: |+ [4 V% QQ:明白了& q) M: t# H$ k6 g; d$ L
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