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Author |
Marchant, P. |
Title |
Evaluating area-wide crime-reduction measures |
Type |
Journal Article |
Year |
2005 |
Publication |
Significance |
Abbreviated Journal |
Significance |
Volume |
2 |
Issue |
2 |
Pages |
62-65 |
Keywords |
lighting; crime; safety |
Abstract |
When we look around an imperfect world, we feel an understandable impulse to improve matters. We may therefore decide to intervene by prescribing medical treatment or by introducing crime reduction measures. But how do we know that what we do is likely to work? In medicine the standard answer is to do a trial; not surprisingly the same is true in crime reduction. But, says Paul Marchant, the lessons learned from medical trials have not been implemented in the latter field. |
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1740-9705 |
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IDA @ john @ |
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253 |
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Author |
Marchant, P.R. |
Title |
A Demonstration That the Claim That Brighter Lighting Reduces Crime Is Unfounded |
Type |
Journal Article |
Year |
2004 |
Publication |
British Journal of Criminology |
Abbreviated Journal |
British Journal of Criminology |
Volume |
44 |
Issue |
3 |
Pages |
441-447 |
Keywords |
lighting; crime; street lighting |
Abstract |
The major systematic review on street lighting and crime, Home Office Research Study 251, suggests that claims for the effectiveness of lighting against crime are justified. The review at first sight appears to be an appropriate statistical synthesis of all studies on street lighting and crime across the world. However on close examination, the statistical claims and methods are unfounded. In three cases examined there is a clear conflict between the evidence and the reviewers' interpretation of this. One of the principal problems is easily seen. The time-series of the original data from the Bristol study shows no good evidence for the crime reduction benefit of lighting. However the review gives the result for the same data as being extremely statistically significant. It is suggested that such a difference between the newly lit and the control areas occurring purely by chance is less than one in a billion, but this is manifestly wrong. Two other component studies, Birmingham and Dudley, are examined. |
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0007-0955 |
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IDA @ john @ |
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254 |
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Johansson, M.; Pedersen, E.; Maleetipwan-Mattsson, P.; Kuhn, L.; Laike, T. |
Title |
Perceived outdoor lighting quality (POLQ): A lighting assessment tool |
Type |
Journal Article |
Year |
2013 |
Publication |
Journal of Environmental Psychology |
Abbreviated Journal |
Journal of Environmental Psychology |
Volume |
39 |
Issue |
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Pages |
14-21 |
Keywords |
Perception; Street lighting; Observation-based environmental assessment; Urban space |
Abstract |
A shift towards more energy-efficient light sources for outdoor lighting such as light-emitting diodes (LEDs) is underway. Photometric measures are not sufficient to capture how users experience the light, so complementary tools are required. This study aimed to develop an observer-based environmental assessment tool, based on bipolar semantic differentials, for outdoor lighting in urban spaces. Exploratory (N = 130) and confirmatory (N = 117) factor analyses of observations of lighting installations made by laypersons on-site along pedestrian paths, resulted in two dimensions of high reliability: the Perceived Strength Quality (PSQ, Cronbach's alpha = 0.82â0.85) and the Perceived Comfort Quality (PCQ, Cronbach's alpha = 0.77â0.81). PSQ and PCQ differentiated between light sources of different illuminance level, colour temperature and colour rendering. Regression analyses showed that the perceived lighting qualities helped to explain the variance in visual accessibility, whereas PCQ helped to explain perceived danger in the environment. The perceived lighting qualities can add to the understanding of pedestrians' perception of outdoor lighting, and is proposed as a complementary tool for development of sustainable light designs in the urban environment. |
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0272-4944 |
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IDA @ john @ |
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279 |
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Zukauskas, A.; Vaicekauskas, R.; Tuzikas, A.; Petrulis, A.; Stanikunas, R.; Svegzda, A.; Eidikas, P.; Vitta, P. |
Title |
Firelight LED Source: Toward a Balanced Approach to the Performance of Solid-State Lighting for Outdoor Environments |
Type |
Journal Article |
Year |
2014 |
Publication |
IEEE Photonics Journal |
Abbreviated Journal |
IEEE Photonics J. |
Volume |
6 |
Issue |
3 |
Pages |
1-16 |
Keywords |
LED; lighting; lighting technology; light emitting diode; firelight LED |
Abstract |
We report on a blue-amber (âfirelightâ) cluster of light-emitting diodes (LEDs) with extra-low correlated color temperature (~1860 K) optimized for outdoor lighting under mesopic conditions. When compared with common white LEDs, the firelight LED cluster shows considerably reduced indexes of melatonin suppression and skyglow, increased retinal illuminance for elderly people, but a reduced performance of perceiving colors, which, however, can be tolerated at mesopic luminance. In comparison with an almost metameric high-pressure sodium lamp, the cluster exhibits a potentially higher luminous efficacy, similar reaction time and detection threshold of luminance contrasts for achromatic targets, and noticeably improved color discrimination characteristics. |
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1943-0655 |
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IDA @ john @ |
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281 |
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Author |
Fotios, S.; Yang, B.; Uttley, J. |
Title |
Observing other pedestrians: Investigating the typical distance and duration of fixation |
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Journal Article |
Year |
2014 |
Publication |
Lighting Research and Technology |
Abbreviated Journal |
Lighting Research and Technologying Res & Tech |
Volume |
47 |
Issue |
5 |
Pages |
548-564 |
Keywords |
traffic safety; pedestrians; roadway lighting; visibility; light at night |
Abstract |
After dark, road lighting should enhance the visual component of pedestriansâ interpersonal judgements such as evaluating the intent of others. Investigation of lighting effects requires better understanding of the nature of this task as expressed by the typical distance at which the judgement is made (and hence visual size) and the duration of observation, which in past studies have been arbitrary. Better understanding will help with interpretation of the significance of lighting characteristics such as illuminance and light spectrum. Conclusions of comfort distance in past studies are not consistent and hence this article presents new data determined using eye-tracking. We propose that further work on interpersonal judgements should examine the effects of lighting at a distance of 15 m with an observation duration of 500 ms. |
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IDA @ john @ |
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309 |
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