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Q:各位大神，能帮我解释下这个吗，是LED路灯上面的
2 x- z% y( r* L2 j# x& [) M4 \. R& ^1 XIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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) _% t9 \- F2 f4 oA: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。
1 |/ ^) t& ]) [第二个是 79流明光效测试报告。LM79整灯的吧。& [8 _, S# M; ^8 Y9 t, D
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?* _$ K: c' c6 k) n' E- L& C
% b, r Y9 l: R, tL70 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 u, W2 O& H2 A, [% o1 C
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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.5 T6 F8 t2 ?4 A5 `5 a; m- E
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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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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.
" j; Y: s7 @" v5 D0 k; MQ:寿命L-70是啥
$ h: p" H+ _4 j, R6 eA:维持70%光通量的寿命) b! Q g C* V$ ~( Z3 {" y
Q:谢谢。学到东西了
& ]- I3 @, F5 |* }2 ]7 ~7 UA: 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; O! e3 l0 K- y% _( F* x+ m. B* H
Q:明白了
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发表于 2018-6-29 10:47:25
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