• Korean Journal of Optics and Photonics
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• v.18 no.4
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• pp.264-269
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• 2007

Today's research has been focused on changing the light source from filament to LED for luminarie illumination to overcome the shortcoming of a filament. The purpose of this research is to make an appropriate high power LED package structure for luminarie. We simulated radiation patterns of the various structures by the ray tracing simulator (Light Tools), and also analyzed the radiation patterns using an LED test system (OL770). As we increased an inner reflector angle, the radiation pattern split into two peaks and the angle between two peaks became larger. In addition, when we increased an outer reflector angle, the angle between side peaks gradually decreased, while it increased again when the angle reach $50^{\circ}$. These results could be understood from the ray tracing of the light reflected from two reflectors. We made the high power LED package for luminarie on the condition of the optimized structure which was made by ray tracing simulation results, and we measured the radiation patterns by using an LED test system, and these results were well matched to the simulation results.

• KIEAE Journal
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• v.9 no.6
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• pp.45-50
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• 2009

Nowadays, the lighting of urban nightscape has become important for improvement in city. Lighting the outdoor is different that lighting an interior. Outdoor lighting designs should be designed to minimize glare, light trespass, light clutter and energy conservation to avoid light pollution. Mokpo city launched into a large scale project of the city beautification using outdoor lighting. However, outcomes of outdoor lighting project have faced strong opposition from environmental groups. This study aims to analyze the light pollution of outdoor lighting in Mokpo-si for creating a health night environment. The Radiant Imaging Prometric-1400 was used to measure the luminance of Yudal Mountain, Goha Island and Luminarie Street. The result showed that the all the outdoor lighting produce light pollution and some places like mountain and island did not need a lot of lighting all the time.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2004.05a
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• pp.3-8
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• 2004

이탈리아에서 처음 시작된 루미나리에는 조명이 어두움을 밝히는 원시적인 기능에서 유희적 기능을 제공하는 축제의 의미로서의 변화를 나타내는 대표적인 예 중의 하나이다. 오늘날 루미나리에는 이탈리아뿐만 아니라 미국, 스페인, 독일, 일본, 한국 등 전 세계에 걸쳐 개최되고 있으며, 이에 본 논문에서는 루미나리에를 대표하는 이탈리아와 일본, 한국의 3개 나라를 중심으로 2003년 루미나리아를 각각 비교 분석함으로써 앞으로 우리나라에서의 루미나리에의 정착과 발전방향에 대하여 살펴보는데 그 목적을 두고 있다. 2003년 처음으로 개최된 우리나라의 부천 루미나리에는 지방자치단체를 중심으로 문화적 도시이미지구현을 위하여 계획되었으며, 오래된 전통을 바탕으로 계획된 이탈리아의 루미나리에나, 시민들을 중심으로 행사금액을 모금하고 민간 주도로 행사가 진행되는 일본의 루미나리에와 더불어 우리나라를 대표하는 조명축제로서의 그 첫걸음을 내딛었다. 아직 우리나라는 초보적인 단계에 있어 행사 홍보의 미흡 및 입장료의 유료화 등의 많은 문제점을 가지고 있으나 앞으로 이탈리아나 일본의 루미나리에 사례를 바탕으로 문제점을 해결해 나감으로써 더 낳은 조명축제로서 발전해 나갈 것으로 판단된다.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.25 no.9
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• pp.738-742
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• 2012

This paper conducted a study on how the heat radiation of light emitting diode(LED) luminaires affects the indoor temperature increase. The effect was compared with that of a 20 W compact fluorescent lamp(CFL) and a 50 W MR16 halogen lamp which are most widely used inside of cruises, a LED downlight and a 4W MR16 LED replacing each of them. We installed a luminarie inside a thermally shielded chamber, measuring the temperature changes under the same volume every 5 minutes and compared the result with theoretically calculated heat radiation. The temperature changes in the chamber was measured four times, on seven hours' period in order to keep sufficient time once the temperature reaches the thermal equilibrium state. The results showed that the temperature of the 20 W E26 CFL and the 10 W LED downlight increased by $21.1^{\circ}C$ and $10.4^{\circ}C$ respectively, while that of the 50 W halogen MR16 and the 4 W LED MR16 increased by $33.9^{\circ}C$ and $4.8^{\circ}C$ respectively. The experimental heat radiation were calculated from the results and the experimental heat radiation of the CFL and the LED downlight were 171.5 cal and 86.5 cal, and those of the halogen MR16 and the LED MR16 were 275.3 cal and 36.5 cal. Therefore, the heat radiation was reduced by 49.5% and 86.7%, respectively, by replacing conventional light source with LED. In conclusion, we can expect a reduction of power consumption in air condition system and the effect on indoor temperature increase by application of LED luminaires.