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Ahn, H.; Lee, S.; Jo, E. |
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Assessment on Lighting Management Zones for Light pollution in Gwangju Metropolitan City |
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Journal Article |
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2018 |
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한국태양에너지학회 학술대회논문집 |
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Lighting; Planning |
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GFZ @ kyba @ |
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1960 |
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Mathews, F.; Roche, N.; Aughney, T.; Jones, N.; Day, J.; Baker, J.; Langton, S. |
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Title |
Barriers and benefits: implications of artificial night-lighting for the distribution of common bats in Britain and Ireland |
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2015 |
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Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences |
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Philos Trans R Soc Lond B Biol Sci |
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370 |
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20140124 |
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Animals; Chiroptera; Nyctalus leisleri; Pipistrellus pipistrellus; pipistrelle bat; Leisler's bat; bats, mammals; artificial light at night; migration; fragmentation; vision; outdoor lighting |
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Artificial lighting is a particular problem for animals active at night. Approximately 69% of mammal species are nocturnal, and one-third of these are bats. Due to their extensive movements—both on a nightly basis to exploit ephemeral food supplies, and during migration between roosts—bats have an unusually high probability of encountering artificial light in the landscape. This paper reviews the impacts of lighting on bats and their prey, exploring the direct and indirect consequences of lighting intensity and spectral composition. In addition, new data from large-scale surveys involving more than 265 000 bat calls at more than 600 locations in two countries are presented, showing that prevalent street-lighting types are not generally linked with increased activity of common and widespread bat species. Such bats, which are important to ecosystem function, are generally considered ‘light-attracted’ and likely to benefit from the insect congregations that form at lights. Leisler's bat (Nyctalus leisleri) may be an exception, being more frequent in lit than dark transects. For common pipistrelle bats (Pipistrellus pipistrellus), lighting is negatively associated with their distribution on a landscape scale, but there may be local increases in habitats with good tree cover. Research is now needed on the impacts of sky glow and glare for bat navigation, and to explore the implications of lighting for habitat matrix permeability. |
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Hatherly Laboratories, University of Exeter, Prince of Wales Road, Exeter EX4 4PS, UK; f.mathews@exeter.ac.uk |
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Royal Society |
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English |
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English |
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The biological impacts of artificial light at night: from molecules to communities |
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IDA @ john @ |
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1123 |
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Author |
Galadí-Enríquez, D. |
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Beyond CCT: The spectral index system as a tool for the objective, quantitative characterization of lamps |
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Journal Article |
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2018 |
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Journal of Quantitative Spectroscopy and Radiative Transfer |
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JQSRT |
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206 |
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399-408 |
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Lighting |
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Correlated color temperature (CCT) is a semi-quantitative system that roughly describes the spectra of lamps. This parameter gives the temperature (measured in kelvins) of the black body that would show the hue more similar to that of the light emitted by the lamp. Modern lamps for indoor and outdoor lighting display many spectral energy distributions, most of them extremely different to those of black bodies, what makes CCT to be far from a perfect descriptor from the physical point of view. The spectral index system presented in this work provides an accurate, objective, quantitative procedure to characterize the spectral properties of lamps, with just a few numbers. The system is an adaptation to lighting technology of the classical procedures of multi-band astronomical photometry with wide and intermediate-band filters. We describe the basic concepts and we apply the system to a representative set of lamps of many kinds. The results lead to interesting, sometimes surprising conclusions. The spectral index system is extremely easy to implement from the spectral data that are routinely measured at laboratories. Thus, including this kind of computations in the standard protocols for the certification of lamps will be really straightforward, and will enrich the technical description of lighting devices. |
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Elsevier |
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English |
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English |
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0022-4073 |
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GFZ @ kyba @ |
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1835 |
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Author |
Franceschini, S.; Pansera, M. |
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Beyond unsustainable eco-innovation: The role of narratives in the evolution of the lighting sector |
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2015 |
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Technological Forecasting and Social Change |
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Technological Forecasting and Social Change |
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92 |
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69-83 |
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Lighting, Society |
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0040-1625 |
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LoNNe @ christopher.kyba @ |
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1186 |
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Author |
Shih, K.-T.; Liu, J.-S.; Shyu, F.; Yeh, S.-L.; Chen, H.H. |
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Title |
Blocking harmful blue light while preserving image color appearance |
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Journal Article |
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2016 |
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ACM Transactions on Graphics |
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Tog |
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35 |
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6 |
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1-10 |
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Keywords |
Lighting; Vision |
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Recent study in vision science has shown that blue light in a certain frequency band affects human circadian rhythm and impairs our health. Although applying a light blocker to an image display can block the harmful blue light, it inevitably makes an image look like an aged photo. In this paper, we show that it is possible to reduce harmful blue light while preserving the blue appearance of an image. Moreover, we optimize the spectral transmittance profile of blue light blocker based on psychophysical data and develop a color compensation algorithm to minimize color distortion. A prototype using notch filters is built as a proof of concept. |
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0730-0301 |
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LoNNe @ kyba @ |
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1640 |
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