Why be concerned about outdoor lighting? Teton County has star visibility that is lost elsewhere. It is almost surrounded by National Forest land or wilderness areas. It is adjacent to Grand Teton National Park, and not far from Yellowstone Park, which have strong Dark Sky Preservation policies. Besides the scenic landscapes, our starry skies and low light pollution give us impressive nightscapes. The rural character of the area is enhanced by low light levels. Evidence is mounting for health effects on circadian rhythms and inhibited cancer resistance. Humans and animals are tuned to blue light during the day and darkness at night, and blue and other light at night disrupts their natural patterns. Driving and walking are safer where lights don’t glare in drivers or walkers eyes. |
Cover: The cover shows a color map of skyglow in the Valley from satellite measurements: See P. Cinzano, F. Falchi , and C.D. Eldredge, http://www.lightpollution.it/dmsp/artbri.html Blue means 1/3 increase in natural light. Green means a doubling of natural light sky light. View: Google Earth |