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Tucson, Arizona, U.S. Skyglow Reduced 7% after Street Light Conversion

Tucson, Arizona, U.S. Skyglow Reduced 7% after Street Light Conversion Thumbnail

John Barentine, Director of Conservation at the International Dark-Sky Association, is the lead author of a recent study published online by the Journal of Quantitative Spectroscopy and Radiative Transfer. Although Barentine has previously published papers… Read More

IDA Announces Criteria for Community-Friendly Outdoor Sports Lighting

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IDA’s mission is to preserve and protect the nighttime environment and our heritage of dark skies through environmentally responsible lighting. The need for environmentally responsible outdoor lighting that balances the human need for light with… Read More

Call for New Members for the International Dark-Sky Association Technical Committee

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The International Dark-Sky Association Technical Committee provides guidance to the IDA Board, Executive Director, and staff on policies and guidelines related to outdoor lighting practices. This highly skilled team of lighting specialists and environmental scientists… Read More

Five Years of Satellite Images Show Global Light Pollution Increasing at a Rate of Two Percent Per Year

Five Years of Satellite Images Show Global Light Pollution Increasing at a Rate of Two Percent Per Year Thumbnail

Five years of advanced satellite images show that there is more artificial light at night across the globe, and that light at night is getting brighter. The rate of growth is approximately two percent each… Read More

Nobel Prize Awarded for Discovery of Molecular Mechanisms Controlling the Circadian Rhythm

Nobel Prize Awarded for Discovery of Molecular Mechanisms Controlling the Circadian Rhythm Thumbnail

The Nobel Assembly at Karolinska Institute today announced the 2017 Nobel Prize in Physiology or Medicine is awarded jointly to Jeffrey C. Hall, Michael Rosbash and Michael W. Young “for their discoveries of molecular mechanisms… Read More

LEDs In Your Community Webinar

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Grassroots supporters from 15 countries joined IDA technical director, Pete Strasser, for a free webinar about LED lights, technology, and how to promote responsible lighting in local communities on August 31. Click here to access… Read More

BBC Explores True Cost of LED Lights

Brian Wheeler of the BBC shares the story of Karen Snyder, and her friend, Delores Bushong whose neighborhood in Washington DC recently installed 4,000 Kelvin LED streetlights. Snyder and Bushong oppose the bright lights and want their… Read More

Night Skies in Arizona and Beyond

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Arizona resident, Mike Powell, recently wrote a column for the Paris Review describing dark skies in Arizona. Powell describes the unique harshness of the desert sun and the surprising dark nights Arizonan’s have been able to… Read More

3 Insects Affected by Light Pollution

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If all mankind were to disappear, the world would regenerate back to the rich state of equilibrium that existed ten thousand years ago. If insects were to vanish, the environment would collapse into chaos. — Naturalist E… Read More

Judge Ruled Against City of Monterey Over LED Conversion

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Recently, a judge ruled against the city of Monterey, stating they violated the California Environmental Quality Act and the Brown Act when they began their LED streetlight conversion in 2009. A group of Monterey residents calling… Read More