| Records |
| Author |
Davidovic, M.; Djokic, L.; Cabarkapa, A.; Kostic, M. |
| Title |
Warm white versus neutral white LED street lighting: Pedestrians' impressions |
Type |
Journal Article |
| Year |
2018 |
Publication |
Lighting Research & Technology |
Abbreviated Journal |
Lighting Research & Technology |
| Volume |
in press |
Issue |
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Pages |
147715351880429 |
| Keywords |
Psychology; Security |
| Abstract |
The subjective impressions of pedestrians are necessary in order to decide on the appropriate colour of light to be used for street lighting. Therefore, a pilot project aimed to compare subjective evaluations of the sidewalk illumination under two street lighting installations, realised by LEDs of 3000 K (warm white) and 4000 K (neutral white), was recently conducted in Belgrade. Both installations had comparable sidewalk illuminances as well as other relevant photometric parameters. The evaluation was done through a questionnaire. A group of 139 (61 male and 78 female) respondents, all of them university students, was asked to grade both lighting installations for the sidewalk light intensity, the appearance of human faces, the colour of light and the colour rendering as well as the overall impression. According to the median values, the 3000 K LED installation was considered better than the 4000 K installation for all aspects assessed as well as the overall impression. Although the survey results convincingly showed a preference for 3000 K LEDs for this comparison, additional research is needed using a more representative sample of people and a wider range of locations before a definite conclusion can be reached. |
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1477-1535 |
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GFZ @ kyba @ |
Serial |
2045 |
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| Author |
Fotios, S.; Monteiro, A.L.; Uttley, J. |
| Title |
Evaluation of pedestrian reassurance gained by higher illuminances in residential streets using the day–dark approach |
Type |
Journal Article |
| Year |
2018 |
Publication |
Lighting Research & Technology |
Abbreviated Journal |
Lighting Research & Technology |
| Volume |
in press |
Issue |
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Pages |
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| Keywords |
Vision; Psychology; Security |
| Abstract |
A field study was conducted to investigate how changes in the illuminance affect pedestrian reassurance when walking after dark in an urban location. The field study was conducted in daytime and after dark in order to employ the day–dark approach to analysis of optimal lighting. The results suggest that minimum illuminance is a better predictor of reassurance than is mean illuminance. For a day–dark difference of 0.5 units on a 6-point response scale, the results suggest a minimum horizontal illuminance of approximately 2.0 lux. |
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1477-1535 |
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GFZ @ kyba @ |
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2159 |
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| Author |
Wanvik, P.O. |
| Title |
Effects of road lighting on motorways |
Type |
Journal Article |
| Year |
2009 |
Publication |
Traffic Injury Prevention |
Abbreviated Journal |
Traffic Inj Prev |
| Volume |
10 |
Issue |
3 |
Pages |
279-289 |
| Keywords |
Lighting; Public Safety; Security |
| 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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English |
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1538-9588 |
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PMID:19452370 |
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no |
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LoNNe @ kyba @ |
Serial |
1788 |
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| Author |
Park, H.-K.; Gu, J.-H.; Lee, K.-M. |
| Title |
A study on selecting of Light Cutoff Panel depending on the installation condition using the lighting simulation |
Type |
Journal Article |
| Year |
2016 |
Publication |
Journal of the Korea Academia-Industrial cooperation Society |
Abbreviated Journal |
Journal of the Korea Academia-Industrial cooperation Society |
| Volume |
17 |
Issue |
2 |
Pages |
246-251 |
| Keywords |
Lighting; Light cutoff panel; Light pollution; Light trespass; Relux; Security light |
| 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. |
| 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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no |
| Call Number |
IDA @ john @ |
Serial |
1448 |
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| Author |
Suk, J.Y.; Walter, R.J. |
| Title |
New nighttime roadway lighting documentation applied to public safety at night: A case study in San Antonio, Texas |
Type |
Journal Article |
| Year |
2019 |
Publication |
Sustainable Cities and Society |
Abbreviated Journal |
Sustainable Cities and Society |
| Volume |
46 |
Issue |
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Pages |
101459 |
| Keywords |
Lighting; Public Safety; Security; Planning |
| Abstract |
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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no |
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GFZ @ kyba @ |
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2191 |
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