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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) `- W5 X5 K5 v0 ]6 y7 M
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
8 Q5 m; t, P& G7 ]5 l! i; u* Y5 Rof Solid-State Lighting Products# A, p% m# T* H' g# r$ m( ^
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。& T) p& s0 p& ~, q+ v3 I/ M+ [1 Z
第二个是 79流明光效测试报告。LM79整灯的吧。' N- L: W) K0 w0 Y! t# Z
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?5 q2 x5 R7 y. P! ]( p/ h
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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).
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4 C2 t& @: m t" ELM79, 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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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 `, X( o! Z. L1 `
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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.5 M8 ?; ]2 d$ F- a
Q:寿命L-70是啥
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8 v [0 ]0 u G3 ^% Q/ y& mQ:谢谢。学到东西了& K* |0 ^% M0 `3 @
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) B' e$ Z0 H0 e! \' I8 _$ K3 ]
Q:明白了
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发表于 2018-6-29 10:47:25
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