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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
$ i/ E$ L$ G6 p- D) `; B* q" I( BIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements$ O' w6 }1 s# ~$ j a
of Solid-State Lighting Products
K2 ~9 y, ]: h/ \- F, nA: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。3 W W+ T+ l# L# M' k
第二个是 79流明光效测试报告。LM79整灯的吧。
E' H# M% c8 o4 `- }. UThe LED lighting industry is awash with confusing jargon and abbreviations. Here’s four for starters:- L70, LM79, LM80, TM21. So what do they mean?" R+ T8 ~: |1 I% r3 J, |' e
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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).2 ]' q: n# C' ^- M% g4 p/ D/ ?
1 h1 U' `3 c1 {7 E5 VLM79, 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.+ K0 f: ]. H f8 f
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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. ]) e% l1 }) _) C5 ]
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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.0 B- K5 M c& q
Q:寿命L-70是啥
( s: e6 o) l$ FA:维持70%光通量的寿命# o H; W. n3 l& @9 N6 q( A: r/ | w. T
Q:谢谢。学到东西了
: K2 m% p1 C4 S O A3 zA: 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+ b: {) e$ }$ A0 \ K4 m3 U6 X+ I1 l
Q:明白了 s2 I' R0 k, x' K) \
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发表于 2018-6-29 10:47:25
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