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

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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
    ' }- t# P/ ?# c2 w' h! z( pIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
    , K, Z4 T, J2 f- q- U* kof Solid-State Lighting Products
    ! M0 a: S+ \% @8 IA: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。
    ! W9 j* J7 x" Z& K第二个是 79流明光效测试报告。LM79整灯的吧。
    ; W% H4 C, m) Z' v* aThe LED lighting industry is awash with confusing jargon and abbreviations.  Here’s four for starters:- L70, LM79, LM80, TM21.  So what do they mean?
    * u* G0 e2 v+ ?9 |" T
    / m: p- @( Y  _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).
    6 X* G7 U2 D# `* Z1 X
    * u7 E' `8 X. BLM79, 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.
    - {7 ^8 M4 R9 Y/ Q& V- k, z
    - `: j8 S! D' S+ Z4 @" KLM80, 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.
    , C, [1 i: I2 Q" o& v
    8 A2 i' \% C) Z0 h7 p: I& U; 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.
    ) a1 d  o7 d5 o( c) DQ:寿命L-70是啥
    % V. n' _9 M7 HA:维持70%光通量的寿命
    $ Q2 b- v1 Z5 F4 b4 jQ:谢谢。学到东西了  O" q- T1 w" z8 ]# N, W+ c
    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& C7 H( t1 W5 r% }4 ]" Y, x  [
    Q:明白了# E8 _  A3 P. A7 R. w6 ^, [* a
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