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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+ h8 V7 d% Y* O2 N1 p* Z& i" J
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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" c+ R; v9 E& F0 MA: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。# O( W Z2 v* {! p6 f
第二个是 79流明光效测试报告。LM79整灯的吧。8 H a2 F7 q R4 k* D" D* @) E
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?
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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).4 ?3 Y! ?( h; I7 M/ t* @" p" l/ T/ B
) Q M0 P& K( k" J) X$ m8 H% m+ KLM79, 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.
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6 ^' }* f& H4 m7 Q3 B) ALM80, 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.$ U2 n% i, y7 b9 ^0 t
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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.+ m9 Y1 _; X1 [) [' b
Q:寿命L-70是啥" Y7 t/ ]) W' Z: |0 v. P, f
A:维持70%光通量的寿命3 |9 H3 {2 I: C- \+ n5 ^9 h
Q:谢谢。学到东西了; r/ H; s7 l' P/ I
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
, ^+ C; s/ q- L! v2 Y. wQ:明白了
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发表于 2018-6-29 10:47:25
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