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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
) |! x! e* x4 ?" BIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements' }- }/ A: u: ], c' f5 ]
of Solid-State Lighting Products+ r& J9 v$ z3 B& P5 Z
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。3 K6 ^4 O4 L3 L" y1 ~: d" [
第二个是 79流明光效测试报告。LM79整灯的吧。/ M5 A" X9 S5 F$ k' k) X
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 v: S+ k0 f- L: [% K/ c) ]+ _
* G; w) p9 Q& s3 p6 S- K/ [5 mLM79, 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. j |# j+ v8 C' S4 ^6 w: |
/ x: ^* C h' N3 tLM80, 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. A: r& y5 M2 H4 V; V+ w
/ a/ O/ W* [& ~& sLM80 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.9 b+ t2 M8 o4 h5 X" v* R- F
Q:寿命L-70是啥! v- w! Y* _1 r) s5 \
A:维持70%光通量的寿命 W) e7 ?: L+ R8 _
Q:谢谢。学到东西了
6 w( n- L* ]& D' z( gA: 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
' F% Y4 H8 y1 g# x" iQ:明白了2 H, C+ y3 N# C2 B
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发表于 2018-6-29 10:47:25
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