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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7 g9 p+ v" A3 P& A* E
    IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    4 s* X3 {8 H' [6 }3 B; W0 @- e' nof Solid-State Lighting Products6 [' D- V0 J# J: v5 \
    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。
    ; N# B' {" T1 V. z第二个是 79流明光效测试报告。LM79整灯的吧。. L6 N0 \/ a/ [( A2 h
    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?% x# |" \* |) g+ P! K) d1 F

    ; j& |# a% R0 U; O. 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).1 j5 _/ ^. h, B9 X

    $ J& X8 q! p5 W2 n- {  g: nLM79, 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.
    1 g7 i6 y/ `# G( a+ I, @1 G% E, M( J( T$ N$ j
    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.
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    ' W: r+ L3 x3 [/ ^' w- ~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.7 X) `( [, v5 u9 J
    Q:寿命L-70是啥
    . u9 B* }$ L! Z" [A:维持70%光通量的寿命  U) ^4 D; l& a; T8 F0 ?3 |
    Q:谢谢。学到东西了  X+ Y% o/ X+ f; k* u
    A: 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 ^& m# ?) z9 O$ Z7 v1 J/ rQ:明白了: Y6 [. X1 I  k6 E# H* Z, [
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