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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
: V& W, J0 t! t9 A1 PIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
2 n" K9 f/ U: F# Aof Solid-State Lighting Products: G2 a: L& _! b8 o; O8 b$ V% x. W
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。
2 K: m! Z# V, |1 F$ r2 h8 A第二个是 79流明光效测试报告。LM79整灯的吧。
' E! r( G# ^& M8 ]2 l2 a! ^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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2 W2 e6 J' n& p0 s) o2 iL70 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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2 W. L# J( K3 V( ]/ D0 iLM79, 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 O. b" y* ^3 Q
f$ P/ t) @% p- M) JLM80, 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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* V- w5 g9 Y! MLM80 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.+ U: P( m0 K& N
Q:寿命L-70是啥
6 a* j8 ^! n; k1 ?A:维持70%光通量的寿命
) [6 s0 f/ s; B1 h6 i( p# \Q:谢谢。学到东西了+ A" Z& ?4 w$ Z+ L. k( \
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
8 x3 u* a$ \ bQ:明白了
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发表于 2018-6-29 10:47:25
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