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Author |
Park, H.-K.; Gu, J.-H.; Lee, K.-M. |
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Title  |
A study on selecting of Light Cutoff Panel depending on the installation condition using the lighting simulation |
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Journal Article |
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Year |
2016 |
Publication |
Journal of the Korea Academia-Industrial cooperation Society |
Abbreviated Journal |
Journal of the Korea Academia-Industrial cooperation Society |
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Volume |
17 |
Issue |
2 |
Pages |
246-251 |
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Keywords |
Lighting; Light cutoff panel; Light pollution; Light trespass; Relux; Security light |
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Abstract |
The use of security lighting that emits spill light is considered a cause of light trespass problems in the residential areas. Therefore, a cutoff panel was installed as an alternative way to reduce light trespass. On the other hand, it has another problem in that it is less effective and is not good enough for aesthetics and safety. In this study, a light cutoff panel was designed and manufactured to reduce the light trespass, and the structure of a proper light cutoff panel was studied. Using a goniophotometer, the light distribution file (IES file) was extracted and the characteristics of light distribution were analyzed using the RELUX program. The results showed that the reduction of spilt light in the backward direction was decreased significantly for all types of light cutoff panels except the coated globe. In the case of a black powder coated light cutoff panel, the forward light caused by light reflected from the surface of the light cutoff panel was also reduced, which means that the black powder coated light cutoff panel is effective in the performance of light cutoff in the forward and backward directions. In addition, the coated glove increased the spilt light in the forward and backward directions because it reflects the upward light to go down. A 90 % accuracy between the measurement value of light trespass and the expected value of the light trespass was obtained from a simulation. |
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National Institute of Environmental Research; mossad61(at)korea.kr |
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KoreaScience |
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Korean |
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English |
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1975-4701 |
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IDA @ john @ |
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1448 |
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Author |
Gutierrez-Escolar, A.; Castillo-Martinez, A.; Gomez-Pulido, J.; Gutierrez-Martinez, J.-M.; Stapic, Z.; Medina-Merodio, J.-A. |
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Title |
A Study to Improve the Quality of Street Lighting in Spain |
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Journal Article |
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Year |
2015 |
Publication |
Energies |
Abbreviated Journal |
Energies |
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Volume |
8 |
Issue |
2 |
Pages |
976-994 |
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Keywords |
Energy; Lighting; Planning; Regulation |
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1996-1073 |
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LoNNe @ christopher.kyba @ |
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1096 |
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Author |
Li, Q.F.; Yang, G.X.; Yu, L.H.; Zhang, H. |
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Title |
A survey of the luminance distribution in the nocturnal environment in Shanghai urban areas and the control of luminance of floodlit buildings |
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Journal Article |
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Year |
2006 |
Publication |
Lighting Research & Technology |
Abbreviated Journal |
Lighting Research & Technology |
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38 |
Issue |
3 |
Pages |
185-189 |
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Keywords |
Lighting |
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Abstract |
A survey of the luminance distribution of the nocturnal environment in Shanghai urban areas, which included 11 locations and 16 buildings, was made. The 11 locations could be categorized as commercial, administration, leisure or residential. The average environmental luminance of these was recorded. The authors identified the effects of excessive exterior lighting. The luminance was measured and subjective appraisals made of 16 buildings. The writers have developed an empirical formula for arriving at the brightness level rating for floodlit buildings and recommended corresponding working ranges of luminance. |
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1477-1535 |
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GFZ @ kyba @ |
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2715 |
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Arnold, G.; Mellinger, D.; Markowitz, P.; Burke, M.; Lahar, D. |
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A Win-Win-Win for Municipal Street Lighting: Converting Two-Thirds of Vermont's Street Lights to LED by 2014. |
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2012 |
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American Council for an Energy-Efficient Economy. |
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Lighting Systems |
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Reducing energy costs and enhancing the nighttime environment with LED street lighting
is by now well understood. However, few municipalities and utilities have successfully taken
advantage of this opportunity to convert their street lighting operations to LEDs. Before a
system-wide conversion of existing street lights can occur, a utility must obtain the large amount
of required capital, identify appropriate LED street light equipment for their applications,
consider changes in utility rate structures, and design effective methods for recovering costs.
Using Vermont as a case study, this paper presents a partnership model among the statewide
energy efficiency utility, the state’s largest electric utilities, and several municipalities. The
model was designed to overcome the challenges to widespread LED street light conversion. By
2014, more than two-thirds of Vermont’s municipal street lights will be upgraded to LED
technology. The conversion will: (1) provide municipalities with better nighttime street lighting
and significant cost savings—at no additional capital expense to the municipalities, (2) deliver
8,000 MWh of cost-effective new savings to the energy efficiency utility, and (3) deliver
financially attractive returns for Vermont’s utilities. This win-win-win model is scalable and
replicable, and is now being considered in Massachusetts and Rhode Island |
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LoNNe @ christopher.kyba @ |
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446 |
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Author |
Takemura, Y.; Ito, M.; Shimizu, Y.; Okano, K.; Okano, T. |
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Title |
Adaptive light: a lighting control method aligned with dark adaptation of human vision |
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Journal Article |
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2020 |
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Scientific Reports |
Abbreviated Journal |
Sci Rep |
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10 |
Issue |
1 |
Pages |
11204 |
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Keywords |
Human Health; Vision; Lighting |
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Abstract |
Light exposure before sleep causes a reduction in the quality and duration of sleep. In order to reduce these detrimental effects of light exposure, it is important to dim the light. However, dimming the light often causes inconvenience and can lower the quality of life (QOL). We therefore aimed to develop a lighting control method for use before going to bed, in which the illuminance of lights can be ramped down with less of a subjective feeling of changes in illuminance. We performed seven experiments in a double-blind, randomized crossover design. In each experiment, we compared two lighting conditions. We examined constant illuminance, linear dimming, and three monophasic and three biphasic exponential dimming, to explore the fast and slow increases in visibility that reflect the dark adaptation of cone and rod photoreceptors in the retina, respectively. Finally, we developed a biphasic exponential dimming method termed Adaptive Light 1.0. Adaptive Light 1.0 significantly prevented the misidentification seen in constant light and effectively suppressed perceptions of the illuminance change. This novel lighting method will help to develop new intelligent lighting instruments that reduce the negative effect of light on sleep and also lower energy consumption. |
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The Smart Life Science Institute, ACROSS, Waseda University, Tokyo, Japan. okano@waseda.jp |
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2045-2322 |
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PMID:32641723; PMCID:PMC7343865 |
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GFZ @ kyba @ |
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3050 |
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