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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9 a) `; i3 q. G, t `# b1 g+ t
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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0 l- d7 T6 o* ]5 E% _6 u0 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。 n& O6 Z5 h _8 C1 G! Z
第二个是 79流明光效测试报告。LM79整灯的吧。
# Q8 A$ A2 P+ w; [7 z& SThe 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 ~' a6 c" J D4 ]7 n) _& 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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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.
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3 I/ f W7 U& N! _0 ]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.; l8 @+ G4 @ L2 \2 R/ z: J7 |
Q:寿命L-70是啥1 ] Y; v/ v" \ `6 ]
A:维持70%光通量的寿命3 {% l( J( Y* g0 ?* \/ s6 \3 v) F# x
Q:谢谢。学到东西了
1 ~( w1 {) }" M& X3 D$ TA: 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
6 G3 G! ?& o0 aQ:明白了; [; m9 s) M$ @ Q
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发表于 2018-6-29 10:47:25
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