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Author Wieduwilt, A.; Alsat, E.A.; Blickwedel, J.; Strizek, B.; Di Battista, C.; Lachner, A.B.; Plischke, H.; Melaku, T.; Muller, A.; Bagci, S.
Title (up) Dramatically altered environmental lighting conditions in women with high-risk pregnancy during hospitalization Type Journal Article
Year 2020 Publication Chronobiology International Abbreviated Journal Chronobiol Int
Volume in press Issue Pages
Keywords Lighting; Human Health; Pregnant women; circadian rhythm; color temperatures; hospital light environmental; illuminance; indoor
Abstract The maternal circadian time structure is incredibly important in the entrainment and programing of the fetal and newborn circadian time structure. Natural sunlight is the primary environmental time cue for entrainment of circadian rhythms, but high-risk pregnant women spend most of their time indoors with artificial light sources and extremely low levels of natural light both during the day and night. Because the daily level, timing, duration of light exposure and its spectral properties are important in maintaining the normal circadian physiology in humans, we aimed to evaluate the environmental lighting conditions in high-risk pregnant women admitted to hospital for long-term stay. About 30 patients were included in the study. Exposed illuminance, color temperature and effective circadian radiation dose were measured and recorded every 10 s by light dosimeters attached to the patients' clothing. We documented the illuminance of 29 pregnant women on 235 inpatient days. Median (IQR) measured illuminance was 70 (28-173) lux in the morning, 124 (63-241) lux in the afternoon, 19 (6-53) lux in the evening and 0 (0-0) lux at the night. Median illuminance for the 235 inpatient days of assessment was below the recommended EU standard of 100 lux-60.5% of the mornings and 42.7% of the afternoons. The women confined to indoor locations rarely achieved an illuminances more than 300 lux in the morning and in the afternoon. Compared to women with outdoor mobility, those confined indoors have a significantly lower illuminance and color temperature, both in the morning and in the afternoon. Our study presents the first information about the dramatically altered environmental lighting conditions experienced by high-risk pregnant women during their hospital stay. Their exposure to light while in the hospital is significantly lower than exposure to natural daylight levels and below the recommended EU standard.
Address Department of Neonatology and Pediatric Intensive Care Medicine, Children's Hospital, University of Bonn , Bonn, Germany
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Language English Summary Language Original Title
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Series Volume Series Issue Edition
ISSN 0742-0528 ISBN Medium
Area Expedition Conference
Notes PMID:32752886 Approved no
Call Number GFZ @ kyba @ Serial 3061
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Author Bieske, K.; Schierz, C.
Title (up) Dynamic Lighting – Perception of Luminous Colour Variation. Type Journal Article
Year 2010 Publication In Proceedings of CIE 2010 „Lighting quality and energy efficiency“. Abbreviated Journal
Volume Issue Pages 290–297
Keywords Lighting
Abstract
Address
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Notes Approved no
Call Number LoNNe @ kagoburian @ Serial 997
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Author Dobler, G.; Ghandehari, M.; Koonin, S.E.; Nazari, R.; Patrinos, A.; Sharma, M.S.; Tafvizi, A.; Vo, H.T.; Wurtele, J.S.
Title (up) Dynamics of the urban lightscape Type Journal Article
Year 2015 Publication Information Systems Abbreviated Journal Information Systems
Volume 54 Issue Pages 115–126
Keywords lighting, society, skyglow
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Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0306-4379 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number LoNNe @ christopher.kyba @ Serial 1212
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Author Campisi, D.; Gitto, S.; Morea, D.
Title (up) Economic feasibility of energy efficiency improvements in street lighting systems in Rome Type Journal Article
Year 2017 Publication International Journal of Energy Economics and Policy Abbreviated Journal
Volume 7 Issue 1 Pages 190-198
Keywords Economics; Energy; Society; LED lighting; LED; real options
Abstract This study evaluates an investment project concerning the redevelopment of the public lighting of the Municipality of Rome. In particular, we consider the replacing of the traditional lamps of the system with LED lamps. We consider the factors that affect this kind of project: the cost of energy, the manteinance cost, the investment cost and the Weighted Average Cost of Capital (WACC). Our results underline the reduction of energy consumption and of the maintenance costs, lower emissions of CO2 into the atmosphere, the reduction of light pollution, the positive effects on road safety and the indipendence by incentives.
Address Department of Industrial Engineering, University of Rome Tor Vergata, Italy
Corporate Author Thesis
Publisher Elsevier Place of Publication Editor
Language English Summary Language English Original Title
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ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ intern @ Serial 2629
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Author Sweater-Hickcox, K.; Narendran, N.; Bullough, J.; Freyssinier, J.
Title (up) Effect of different coloured luminous surrounds on LED discomfort glare perception Type Journal Article
Year 2013 Publication Lighting Research and Technology Abbreviated Journal Lighting Research and Technology
Volume 45 Issue 4 Pages 464-475
Keywords perception; subjective; LED; LED lighting; spectral power distribution; SPD
Abstract Recently, there has been increased interest in energy-efficient lighting as energy resources become higher in demand. Anecdotal evidence suggests that certain populations believe light-emitting diodes (LED) produce more glare than traditional technologies. This may be due to a number of factors such as spectral power distribution (SPD), source luminance, or beam intensity distribution. A study was conducted to assess the effect of different SPDs on the perception of discomfort glare from an LED source. For the range of conditions evaluated, the presence of any luminous surround significantly reduced the perception of discomfort glare from the LED array. The blue luminous surround reduced discomfort glare perception significantly less than the white or the yellow luminous surrounds. The implications for solid-state lighting systems are discussed.
Address Lighting Research Center, Rensselaer Polytechnic Institute, Troy, NY, USA
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Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1477-1535 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 338
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