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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- c8 r; I' k; _+ S( \
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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! g5 T& P; K3 f1 aA: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。
( e7 t8 {' M2 x, `1 i5 E第二个是 79流明光效测试报告。LM79整灯的吧。* @4 {" P# u! h
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?& i6 c2 C! V( R6 C( q. e: i3 b5 l
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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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LM79, 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.! O3 m$ Y t! g
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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.
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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.' {% w0 i" Z7 a. [* ~% h. m
Q:寿命L-70是啥+ p: d! }5 w5 C
A:维持70%光通量的寿命) I' h, p7 i L
Q:谢谢。学到东西了
. \3 R; W, m9 a# KA: 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- |/ B9 I7 {8 g+ b/ l4 t. b2 D% [2 L
Q:明白了
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发表于 2018-6-29 10:47:25
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