热门搜索: LED LED照明询盘 LED区域分布

<
查看: 2084|回复: 0

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

[复制链接]
  • TA的每日心情
    奋斗
    2026-3-2 07:19
  • 签到天数: 14 天

    [LV.3]偶尔看看II

    3万

    主题

    712

    回帖

    11万

    积分

    管理员

    积分
    111681

    最佳新人活跃会员热心会员推广达人宣传达人灌水之王突出贡献优秀版主荣誉管理论坛元老

    QQ
    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! J" Z- e8 A1 A$ Q) f
    IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements9 M2 I% `. _) U6 `
    of Solid-State Lighting Products) I" Q2 R9 X9 @2 {& K
    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。
    ! P2 K3 B1 c$ p$ i第二个是 79流明光效测试报告。LM79整灯的吧。) C$ k/ l9 c+ `+ g
    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?) S3 _, m3 F3 Z# h% L
    ; |9 F; l6 \! U5 u% @
    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).
    : f, K0 L7 u; u7 O: O* ?
    , Q; Y9 V; V0 @1 L% pLM79, 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.. X8 P. ?; C( x8 Y5 R$ D: ~3 |

    . z; R$ {) C* x/ P( {; _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.* d$ Y) Z  d7 i( o
    ) ]  w0 v6 V3 G% L
    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.
    & t$ D3 I6 ]& X3 D1 aQ:寿命L-70是啥
    1 |1 u4 _1 L0 O2 v* iA:维持70%光通量的寿命' `( }9 H% c* e  m0 Y
    Q:谢谢。学到东西了
    8 i" ~% ?& t$ F; i# a  h7 xA: 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  L( n/ u7 K4 Z2 F: K5 i+ y
    Q:明白了
    3 x9 h. I" p- S5 n! h; S  l
    回复

    使用道具 举报

    您需要登录后才可以回帖 登录 | 立即注册

    本版积分规则

    QQ|手机版|LED盘 ( 粤ICP备18067418号 )

    GMT+8, 2026-7-29 08:35 , Processed in 0.045514 second(s), 25 queries , Gzip On.

    LED盘由照盘携照明灯具外贸平台创建,励志打造一流照明,引领灯饰风潮,共筑诚信商圈!

    如有侵权或其他问题,请联系我们.论坛服务:info@toudi.com;广告服务:QQ:1511153,微信:zdapan

    ©2000-2026 LEDPAN版权所有-LED盘网站所有图片和文字等内容字未经许可不得拷贝和复制.