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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* k* y" v% {! \. ]0 I
IESNA 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。# q6 Q8 ^+ f# ]" S. K
第二个是 79流明光效测试报告。LM79整灯的吧。
6 a4 p) x X6 Q3 QThe 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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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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p# M3 w9 a0 h1 `* n; X5 OLM80, 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.. p/ ~& [/ G6 @5 D! ^( A; H
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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.
9 B7 b" u% I$ |, y$ Q' z5 zQ:寿命L-70是啥' |8 G( k. o. Y5 w9 G3 Y
A:维持70%光通量的寿命
; B3 ^ x! ]0 w8 UQ:谢谢。学到东西了% v' K7 R4 J1 v: P O
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$ F5 Z( T6 C) O; _# H* j1 a c
Q:明白了
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发表于 2018-6-29 10:47:25
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