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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" B3 L. u0 ?/ z: ^- _$ h
IESNA LM-79-2008 Approved method for the Electrical and Photometric Measurements: c$ O0 S" f y
of Solid-State Lighting Products
0 P7 o/ d2 c7 r. L3 IA: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。0 h8 b: _1 V, Y0 v9 t5 i
第二个是 79流明光效测试报告。LM79整灯的吧。
" b i" i9 D3 d+ VThe 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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) }. y2 W; R* x9 p0 O: T& a2 kL70 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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2 \5 O% Z: H |9 G) v& Y* hLM79, 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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1 s+ D! f/ y: BLM80, 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.$ Q* [- Y d$ T, ~& ^& m' m
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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 m# z0 ?7 e4 `/ {
Q:寿命L-70是啥
0 ~, Q, R0 C% i% s0 }A:维持70%光通量的寿命
2 D( M1 M+ K1 \3 x* FQ:谢谢。学到东西了
7 p B) F# |( E( LA: 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9 p& D' U( K! o/ B; J8 ]) I4 F
Q:明白了
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发表于 2018-6-29 10:47:25
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