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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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Address |
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 |
Wanvik, P.O. |
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Title |
Effects of road lighting on motorways |
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Journal Article |
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Year |
2009 |
Publication |
Traffic Injury Prevention |
Abbreviated Journal |
Traffic Inj Prev |
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Volume |
10 |
Issue |
3 |
Pages |
279-289 |
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Keywords |
Lighting; Public Safety; Security |
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Abstract |
OBJECTIVES: The study has three objectives. The first is to investigate how the effect of road lighting on motorway accidents varies with different weather and road surface conditions. The second is to evaluate the future benefit of road lighting as a safety measure on motorways. The third is to evaluate the need for further research in the field of motorway lighting. METHOD: This article presents a cross-sectional study of the effects of road lighting on motorways mainly in The Netherlands. The main source of data is a Dutch database of accidents covering the period 1987-2006, but British and Swedish data are also used. RESULTS: The effect of road lighting on motorways is found to be greater in The Netherlands than in Great Britain or Sweden. Reasons for this are not known. Effects are found to vary according to background characteristics and are lesser during precipitation than during fine weather and on wet road surfaces than on dry surfaces. No effect of road lighting is found during fog. Collision with light poles constitutes a large number of accidents on lit motorways and reduces the safety effect of road lighting. CONCLUSIONS: The effect of road lighting on injury accidents during darkness is found to be very high (-49%) on Dutch motorways. However, the effect seems to vary between countries. Collisions with light poles reduce the effect of road lighting. Road lighting will probably be an effective safety measures on motorways for many years. In the long term, however, the benefit of road lighting will probably be reduced along with the implementation of new vehicle and road technology. Modern technology permits a continuous adaptation of luminance levels to optimize the effect of road lighting on safety while at the same time minimizing energy consumption. However, more detailed knowledge concerning the effects of road lighting at different lighting levels is needed in order to use this technology effectively. Alternative or additional measures like LED guide lights and light road surfaces also need to be evaluated. |
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Norwegian Public Roads Administration, Region South, Serviceboks 723, Arendal, Norway. per.wanvik@vegvesen.no |
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1538-9588 |
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PMID:19452370 |
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LoNNe @ kyba @ |
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1788 |
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Author |
DeCoursey, W., Braun, D., & Oza, J. |
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Title |
Pedestrian Lighting, Acceptable Levels of Light: A Pilot Project |
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Journal Article |
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Year |
2019 |
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Institute for Public Administration |
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Keywords |
Lighting; Public Safety; Security |
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This pilot project study was intended to demonstrate that assessing the adequacy of an area’s pedestrian lighting need not be an expensive, time-consuming, or overly complicated process. Though the discussion of methods of pedestrian lighting can become quite technical and involved, as demonstrated in a 2016 IPA report on the topic, “Delaware Transportation Lighting Inventory & Assessment” (http://www.ipa.udel.edu/publications/transportationlighting-2016.pdf), simply observing and recording light levels in a given study area is quite straightforward. |
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IDA @ intern @ |
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2710 |
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Author |
Suk, J.Y.; Walter, R.J. |
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Title |
New nighttime roadway lighting documentation applied to public safety at night: A case study in San Antonio, Texas |
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Journal Article |
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Year |
2019 |
Publication |
Sustainable Cities and Society |
Abbreviated Journal |
Sustainable Cities and Society |
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46 |
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101459 |
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Keywords |
Lighting; Public Safety; Security; Planning |
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Built environment and public safety professionals view street lighting as an important factor in improving the well-being of the community at night. Extant research that has examined the relationship between street lighting and public safety has found inconclusive or mixed results and has called for more extensive lighting metrics. Using new lighting measurement technologies and geographic information science, this study builds on previous work to demonstrate new metrics to consider when evaluating public safety, specifically crime and traffic accidents. Downtown San Antonio, Texas is used as a case study to explore illuminance levels on roadways and the driver’s eye, and how these metrics can be used to understand the lighting characteristics of where crime and traffic accidents occur. The findings indicate that the central downtown district in San Antonio has higher illuminance levels than the existing roadway lighting guidelines while the residential downtown neighborhoods have insufficient light levels. Statistical analysis reveals that roadway illuminance levels are higher in areas where no crime occurred and driver’s eye illuminance levels are lower in areas with no traffic accidents. The findings prove the usefulness of new lighting documentation techniques and support the importance of considering illuminance metrics when assessing crime and traffic accidents at night. |
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2210-6707 |
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GFZ @ kyba @ |
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2191 |
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Author |
Rea, M.S.; Bullough, J.D.; Brons, M.S., J.A. |
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Title |
Parking lot lighting based upon predictions of scene brightness and personal safety |
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Journal Article |
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Year |
2015 |
Publication |
Lighting Research and Technology |
Abbreviated Journal |
Lighting Res. & Tech. |
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Volume |
49 |
Issue |
3 |
Pages |
293-304 |
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Keywords |
Lightingl Security; parking lots; public perceptions; lighting levels |
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Providing subjective impressions of security is central to outdoor lighting design. Current parking lot lighting recommendations are based upon photopic illuminances, regardless of spectrum. Scene brightness perception is directly related to impressions of security, and depends upon both light level and spectrum. A provisional model was used to predict scene brightness for three parking lots, each illuminated to different levels by different light sources. Observers judged scene brightness, security and other factors for each lot. The provisional model accurately predicted both scene brightness and security judgements. The lighting associated with the best subjective ratings also had the lowest power density. A design method using ‘brightness illuminance’ is presented, which can lower system costs while maintaining a sense of security by users. |
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Lighting Research Center, Rensselaer Polytechnic Institute, 21 Union Street, Troy, NY 12180, USA. Email: ream(at)rpi.edu |
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SAGE |
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English |
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1477-0938 |
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IDA @ john @ |
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1256 |
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