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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
    5 @; l$ y- ^1 n" e- pIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements  }- x2 S) n  _( U: p# |
    of Solid-State Lighting Products7 ~0 W& b/ b  y- f; O
    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。
    ' H" f6 g3 X, }( J( i) L$ r第二个是 79流明光效测试报告。LM79整灯的吧。% x; X3 ^2 j/ o* f* b
    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?/ L/ ?. ?' H2 |; M* u8 r% y' Q" a
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    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).: S6 A( G, c7 l$ V- y
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    LM79, 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.6 q' \+ q2 R) c- P( n% [/ D4 s

    ! j/ }$ X5 T7 _  w4 E3 L9 LLM80, 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., |2 t: P/ Z6 A1 ^+ D- K: r

    ' O" L& l: `3 W% |: X4 l9 LLM80 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 q6 J$ D  U4 W5 F. y' f3 g( U4 @Q:寿命L-70是啥
    ( g3 Q2 O( ^& }  {- `A:维持70%光通量的寿命$ G' x0 A3 k4 A) H9 x  [' B
    Q:谢谢。学到东西了
    . V! z$ m; d+ e/ 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# H! z& }! n1 k/ s- q8 L
    Q:明白了
    - J  o, ~$ h& Q9 [+ e
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