Artificial Light
Fulltext: Evening use of light-emitting eReaders...
Tablets and E-readers May Disrupt Your Sleep
Light from these devices wakes your brain, study finds
American cities are many times brighter than German counterparts | EurekAlert! Science News
German cities emit several times less light per capita than comparably sized American cities. The size of the gap grew with city size, as light per capita increased with city size in the USA but decreased with city size in Germany.
EHP – Missing the Dark: Health Effects of Light Pollution
EHP – Ultraviolet Leaks from CFLs
With growing concern over energy use, much of the developed world has adopted compact fluorescent lamps (CFLs), which use 25–80% less energy and can last 3–25 times longer than regular incandescent bulbs.1 A new study suggests that certain elements of these bulbs might be improved for safer use.
Photochem Photobiol. 2013 Mar-Apr;89(2):468-73. doi: 10.1111/j.1751-1097.2012.01237.x. Epub 2012 Oct 9. Research Support, Non-U.S. Gov't
Some cities are taking another look at LED lighting after AMA warning - The Washington Post
First-generation high-intensity models emit light that may disturb sleep, raise health risks.
AMA Adopts Guidance to Reduce Harm from High Intensity Street Lights | American Medical Association
Strong arguments exist for overhauling roadway lighting systems with light emitting diodes (LED), but conversions to improper technology can have consequences.
Exposure to 'white' light LEDs appears to suppress body's production of melatonin more than certain other lights, research suggests -- ScienceDailyExposure to the light of 'white' LED bulbs appears to suppress melatonin five times more than exposure to the light of high pressure sodium bulbs that give off an orange-yellow light, according to new research.
Entrainment of the human circadian clock to the natural light-dark cycle. - PubMed - NCBI
Curr Biol. 2013 Aug 19;23(16):1554-8. doi: 10.1016/j.cub.2013.06.039. Epub 2013 Aug 1. Research Support, N.I.H., Extramural
Attenuation of short wavelengths alters sleep and the ipRGC pupil response - Ostrin - 2017 - Ophthalmic and Physiological Optics - Wiley Online Library
Frontiers | Artificial Light at Night Affects Organism Flux across Ecosystem Boundaries and Drives Community Structure in the Recipient Ecosystem | Environmental Science
Artificial light at night (ALAN) is a widespread alteration of the natural environment that can affect the functioning of ecosystems. ALAN can change the movement patterns of freshwater animals that move into the adjacent riparian and terrestrial ecosystems, but the implications for local riparian consumers that rely on these subsidies are still unexplored. We conducted a two-year field experiment to quantify changes of freshwater-terrestrial linkages by installing streetlights in a previously light-naïve riparian area adjacent to an agricultural drainage ditch. We compared the abundance and community composition of emerging aquatic insects, flying insects, and ground-dwelling arthropods with an unlit control site. Comparisons were made within and between years using generalized least squares and a BACI design (Before-After Control-Impact). Aquatic insect emergence, the proportion of flying insects that were aquatic in origin, and the total abundance of flying insects all increased in the ALAN-illuminated area. The abundance of several night-active ground-dwelling predators (Pachygnatha clercki, Trochosa sp., Opiliones) increased under ALAN and their activity was extended into the day. Conversely, the abundance of nocturnal ground beetles (Carabidae) decreased under ALAN. The changes in composition of riparian predator and scavenger communities suggest that the increase in aquatic-to-terrestrial subsidy flux may cascade through the riparian food web. The work is among the ...
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