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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 A2 n/ Z; g- w4 P3 S( b+ kIESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements
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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 C/ Y* K" F4 l) R7 x! h
第二个是 79流明光效测试报告。LM79整灯的吧。
9 ^+ S: R9 J5 C* W3 A) UThe 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).
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8 t: B6 v6 ^' w5 Q2 ULM79, 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./ G9 I; J5 `4 m! n
& E9 z* X/ m& g) C* R6 X2 pLM80, 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.& O8 w D- v8 i# r: `& `+ ~
a2 `9 u3 V; ]2 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.
0 k4 a, r- o8 `5 CQ:寿命L-70是啥5 m' Q1 z6 m9 K7 C- O
A:维持70%光通量的寿命3 @2 ~; f% |5 ~; N
Q:谢谢。学到东西了3 i; Q/ I5 u7 g) b7 n4 E
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
2 F0 i6 t: w! QQ:明白了
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发表于 2018-6-29 10:47:25
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