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Author Kyba C.C.M., Ruby A., Kuechly H.U., Kinzey B., Miller N., Sanders J., Barentine J., Kleinodt R., Espey B. doi  openurl
  Title Direct measurement of the contribution of street lighting to satellite observations of nighttime light emissions from urban areas Type Journal Article
  Year (down) 2020 Publication Lighting Research & Technology Abbreviated Journal  
  Volume in press Issue Pages  
  Keywords Remote Sensing; Lighting; Energy  
  Abstract Nighttime light emissions are increasing in most countries worldwide, but which types of lighting are responsible for the increase remains unknown. Also unknown is what fraction of outdoor light emissions and associated energy use are due to public light sources (i.e. streetlights) or various types of private light sources (e.g. advertising). Here we show that it is possible to measure the contribution of street lighting to nighttime satellite imagery using ‘smart city’ lighting infrastructure. The city of Tucson, USA, intentionally altered its streetlight output over 10 days, and we examined the change in emissions observed by satellite. We find that streetlights operated by the city are responsible for only 13% of the total radiance (in the 500–900 nm band) observed from Tucson from space after midnight (95% confidence interval 10–16%). If Tucson did not dim their streetlights after midnight, the contribution would be 18% (95% confidence interval 15–23%). When streetlights operated by other actors are included, the best estimates rise to 16% and 21%, respectively. Existing energy and lighting policy related to the sustainability of outdoor light use has mainly focused on street lighting. These results suggest an urgent need for consideration of other types of light sources in outdoor lighting policy.  
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  Call Number GFZ @ kyba @ Serial 3185  
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Author Ogoro M.; Ernest S. J.; Chukwudi D. O. url  openurl
  Title Spatial Trend Of Light Pollution In Obio/Akpor Lga, Rivers State, Nigeria Type Journal Article
  Year (down) 2020 Publication International Journal of Novel Research in Civil Structural and Earth Sciences Abbreviated Journal  
  Volume 7 Issue 2 Pages  
  Keywords Lighting; Perception  
  Abstract The study examines the spatial trend of light pollution across the study area. The Global Positioning System (GPS) was used to acquire the coordinates of each respondent resident, where structured questionnaire were administered in the study area and then imported to the ArcGIS 9.3 software environment to analyse the spatial trend in light pollution using the Inverse Distance Weighted (IDW) method of interpolation. Findings, reveals that the perception of pollution by light stray is obviously noticed by the respondents with particular emphasis on light stray from traffic light, neighbor security lights which to a large extend alters their level of comfort and distort their level of outdoor relaxation. Thus, the study recommends, among others, that: shielded light bulbs or properly designed light fittings should be installed to avoid light rays spreading beyond the needed boundaries. And measure should be taken to ensure car drivers use properly fixed headlamps that are not damaged and also, awareness should be passed on adequate use of headlamps by road users (vehicle drivers) on streets when compared with use on highways and minor roads.  
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  ISSN 2394-7357 ISBN Medium  
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  Notes Approved no  
  Call Number UP @ altintas1 @ Serial 3205  
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Author Mehra M. url  openurl
  Title Illuminating Military Installations Type Journal Article
  Year (down) 2020 Publication Society of American Military Engineers Abbreviated Journal  
  Volume 112 Issue 726 Pages 66-68  
  Keywords Lighting; Planning  
  Abstract Military bases must implement high security measures to ensure the safety of personnel and visitors. Lighting is a critical aspect of a base-wide security plan. Installations require high-quality, reliable lighting and real-time reporting and diagnostics so energy and security personnel know when and where luminaires are down and why, allowing them to re-establish the security perimeter more quickly. Modern installations are also concerned with conserving energy and reducing maintenance in order to decrease overall operating costs. An energy-efficient lighting system helps minimize the military’s energy footprint and decrease greenhouse gas emissions. There are, however, challenges associated with these efforts. Most bases sprawl across thousands of acres and include a range of applications that require a broad portfolio of luminaires—from roadways and intersections to security checkpoints, substations, motor pools, and office, housing, and medical buildings. They also include a mix of personnel who reside and work on base. Some military personnel and civilians arrive in the morning and leave at night. Others, including soldiers manning security checkpoints, require illumination for tasks performed after dark. In addition, many installations are located near residential areas or wildlife refuges where sky glow and light pollution must be avoided.  
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  Call Number UP @ altintas1 @ Serial 3207  
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Author Stefani, O.; Freyburger, M.; Veitz, S.; Basishvili, T.; Meyer, M.; Weibel, J.; Kobayashi, K.; Shirakawa, Y.; Cajochen, C. url  doi
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  Title Changing color and intensity of LED lighting across the day impacts on circadian melatonin rhythms and sleep in healthy men Type Journal Article
  Year (down) 2020 Publication Journal of Pineal Research Abbreviated Journal J Pineal Res  
  Volume in press Issue Pages e12714  
  Keywords Human health; Lighting; cognition; humans; male; melatonin; non-visual effects of light; sleep; wakefulness  
  Abstract We examined whether dynamically changing light across a scheduled 16-h waking day influences sleepiness, cognitive performance, visual comfort, melatonin secretion, and sleep under controlled laboratory conditions in healthy men. Fourteen participants underwent a 49-h laboratory protocol in a repeated-measures study design. They spent the first 5-h in the evening under standard lighting, followed by an 8-h nocturnal sleep episode at habitual bedtimes. Thereafter, volunteers either woke up to static light or to a dynamic light that changed spectrum and intensity across the scheduled 16-h waking day. Following an 8-h nocturnal sleep episode, the volunteers spent another 11-h either under static or dynamic light. Static light attenuated the evening rise in melatonin levels more compared to dynamic light as indexed by a significant reduction in the melatonin AUC prior to bedtime during static light only. Participants felt less vigilant in the evening during dynamic light. After dynamic light, sleep latency was significantly shorter in both the baseline and treatment night while sleep structure, sleep quality, cognitive performance and visual comfort did not significantly differ. The study shows that dynamic changes in spectrum and intensity of light promote melatonin secretion and sleep initiation in healthy men.  
  Address Transfaculty Research Platform Molecular and Cognitive Neurosciences (MCN), University of Basel, Basel, Switzerland  
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  ISSN 0742-3098 ISBN Medium  
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  Notes PMID:33378563 Approved no  
  Call Number GFZ @ kyba @ Serial 3219  
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Author Mills, W.; Martin, K.; Cathey, J. url  openurl
  Title Light and Lighting Basics for OSH Professionals Type Journal Article
  Year (down) 2020 Publication Professional Safety Abbreviated Journal  
  Volume 65 Issue 07 Pages 22-30  
  Keywords Review; Human Health; Lighting; Safety  
  Abstract Visible light is all around us, from sunlight to street lighting and automobile headlights to the backlight on a smartphone and in nearly every indoor space. Humans are so accustomed to working and living in artificial light that many of us have not stopped to consider the implications. Most OSH professionals’ experience with light and artificial lighting is likely limited to assessing whether sufficient light exists for people to see where they are going or carry out a task, or whether a light is too bright. This article aims to provide a current review of lighting for OSH professionals. Such a review is timely due to emerging issues including energy efficiency, human health impacts (e.g., blue light hazard, circadian rhythm disruption, fatigue), human performance (e.g., visual performance, visual comfort) and environmental impacts (e.g., light pollution).  
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  ISSN 0099-0027 ISBN Medium  
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  Notes Approved no  
  Call Number UP @ altintas1 @ Serial 3222  
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