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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. [" Q" x9 h7 |4 ~; a0 P+ m
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。: e7 p7 C# i) ?
第二个是 79流明光效测试报告。LM79整灯的吧。- R, z5 Y! |3 \! o2 d
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?9 c4 z' s, I* c) l
2 q5 x! G# x! y2 ML70 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).8 _# A# d* ^# J3 G# k/ ?6 S
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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.( G$ x& }# ~9 [4 S4 F$ K6 X
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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.# ]% q6 _( Y `
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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.$ e7 X5 m! C+ o: T8 j# R0 A: {
Q:寿命L-70是啥
: ?( a' ^- b. ]. jA:维持70%光通量的寿命9 }6 T. l+ Q4 H- j: z$ p' ?
Q:谢谢。学到东西了1 i$ O. o- |$ c; `1 k }8 a
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 }7 G+ H0 a. WQ:明白了
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发表于 2018-6-29 10:47:25
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