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Author (up) Fiorentin, P.; Boscaro, F.
Title A method for measuring the light output of video advertising reproduced by LED billboards Type Journal Article
Year 2019 Publication Measurement Abbreviated Journal Measurement
Volume 138 Issue Pages 25-33
Keywords Lighting; Energy; Instrumentation; Planning; Light-emitting diode displays; Photometry; Video recording; Image analysis; CCD image sensors; Luminance; Glare
Abstract Improving knowledge of the light output of digital billboards is important to better assess their effect on driver distraction when they are installed along roads. In this work the emission of an LED based billboard is measured when playing advertising video-clips. In particular the average and the maximum values of the luminance are evaluated. The same video-clips are also analyzed when shown on an LCD monitor, aiming at separating the variability of the videos and of the playing device. The results allow to evaluate an utilization factor of the billboard: the videos have an average luminance around 11% and a peak luminance of 35% of the maximum luminance obtainable from the billboard. The power consumption of the billboard is measured, aside the photometric analysis. The luminance of the device are found linearly dependent on both the power and the effective current absorbed by the device from the grid, with a discrepancy within 6%. It could be a useful information for billboard manufacturers to qualify their product when they do not own photometric instruments.
Address Department of Industrial Engineering, University of Padova, Padova, Italy; pietro.fiorentin(at)unipd.it
Corporate Author Thesis
Publisher Elsevier Place of Publication Editor
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0263-2241 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2214
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Author (up) Gupta, N.; Lata, H.; Kaur, A.
Title Effect of glare on night time driving in alcoholic versus non-alcoholic professional drivers Type Journal Article
Year 2012 Publication International Journal of Applied & Basic Medical Research Abbreviated Journal Int J Appl Basic Med Res
Volume 2 Issue 2 Pages 128-131
Keywords Vision; Public Safety; Glare; Alcohol; driving; glare recovery
Abstract CONTEXT: The use of alcohol during nighttime driving may affect recovery from glare leading to increased traffic accidents. OBJECTIVE: To compare the glare recovery time in alcoholic versus non-alcoholic drivers. MATERIALS AND METHODS: Alcoholic (n = 25) and non-alcoholic drivers (n = 25) were subjected to glare recovery test and they also filled a questionnaire about the nighttime driving. RESULTS: The glare recovery time got prolonged in alcoholic drivers and they also complained of more problems during nighttime driving as compared to non-alcoholic drivers. CONCLUSIONS: The use of alcohol delays recovery from glare during nighttime driving. This can have considerable implications for developing countries in improving regulations for driving licensing.
Address Department of Physiology, Dayanand Medical College and Hospital Ludhiana, Punjab, India
Corporate Author Thesis
Publisher Kluwer Place of Publication Editor
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2229-516X ISBN Medium
Area Expedition Conference
Notes PMID:23776826; PMCID:PMC3678693 Approved no
Call Number IDA @ john @ Serial 2834
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Author (up) Lin, Y.; Liu, Y.; Sun, Y.; Zhu, X.; Lai, J.; Heynderickx, I.
Title Model predicting discomfort glare caused by LED road lights Type Journal Article
Year 2014 Publication Optics Express Abbreviated Journal Opt. Express
Volume 22 Issue 15 Pages 18056
Keywords LED; LED lighting; glare; road safety; traffic
Abstract To model discomfort glare from LED road lighting, the effect of four key variables on perceived glare was explored. These variables were: the average glare source luminance (Lg), the background luminance (Lb), the solid angle of the glare source from the perspective of the viewer; and the angle between the glare source and the line of sight. Based on these four variables 72 different light conditions were simulated in a scaled experimental set-up. Participants were requested to judge the perceived discomfort glare of these light conditions using the deBoer rating scale. All four variables and some of their interactions had indeed a significant effect on the deBoer rating. Based on these findings, we developed a model, and tested its general applicability in various verification experiments, including laboratory conditions as well as real road conditions. This verification proved the validity of the model with a correlation between measured and predicted values as high as 0.87 and a residual deviation of about 1 unit on the deBoer rating scale. These results filled the gap in estimating discomfort glare of LED road lighting and clarified similarities of and differences in discomfort glare between LED and traditional light sources.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1094-4087 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 351
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Author (up) Longcore, T.; Duriscoe, D.; Aubé, M.; Jechow, A.; Kyba, C.C.M.; Pendoley, K.L.
Title Commentary: Brightness of the Night Sky Affects Loggerhead (Caretta caretta) Sea Turtle Hatchling Misorientation but Not Nest Site Selection Type Journal Article
Year 2020 Publication Frontiers in Marine Science Abbreviated Journal Front. Mar. Sci.
Volume 7 Issue Pages
Keywords Commentary; light pollution; sea turtles; light measurement; photometry; glare; sky quality meter
Abstract A Commentary on “Brightness of the Night Sky Affects Loggerhead (Caretta caretta) Sea Turtle Hatchling Misorientation but Not Nest Site Selection” by Stanley, T. R., White, J. M., Teel, S., and Nicholas, M. (2020). Front. Mar. Sci. 7:221. doi: 10.3389/fmars.2020.00221
Address UCLA Institute of the Environment and Sustainability, Los Angeles, CA, United States
Corporate Author Thesis
Publisher Frontiers Place of Publication Editor
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2296-7745 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 3394
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Author (up) Scott, R.
Title THE RELATIONSHIP BETWEEN ROAD LIGHTING QUALITY AND ACCIDENT FREQUENCY – TRRL LABORATORY REPORT 929. Type Journal Article
Year 1980 Publication Abbreviated Journal
Volume Issue Pages
Keywords Lighting; quality; accident rate; accident; frequency; luminance; glare; uniformity; urban area; daylight; darkness; surfacing; pedestrian
Abstract many studies have related changes in accident frequency to the presence of street lighting, and a few have examined its variation over a range of lighting quality, as measured by illuminance. this investigation attempts to find which of several measures of lighting (describing quantity – as represented by luminance or illuminance – uniformity and glare) most clearly explain variations in accident frequency. about 100 lit sites, almost all in built-up areas, were measured for lighting quality in dry-road conditions. the lighting variables measured were related to the dark:day ratios of accident frequency for the same sites. the strongest relationship found was that for average road surface luminance: in the range 0.5-2.0 candelas/m2, it is estimated that an increase of 1 cd/m2 is associated with a 35 per cent lower accident ratio. other measures of luminance and illuminance were also found to be related to accident ratio (and to each other), but not as clearly as was average road luminance, which is therefore the preferred explanatory variable. analysis of pedestrian and non-pedestrian accidents separately did not reveal a relationship between the former and lighting quality. in contrast, non-pedestrian accidents showed similar relationships to those for all accidents, with the addition of a possible relationship with overall uniformity of luminance.(a)
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number LoNNe @ kagoburian @ Serial 647
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