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

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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

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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

Call to Action! Contact Chicago’s Administration to Demand a Responsible Outdoor Lighting Plan

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IDA’s Executive Director, Scott Feierabend has sent an urgent letter to Chicago’s Mayor, Rahm Emanuel’s regarding the proposed outdoor lighting plan. This letter urges Emanuel and his Administration to choose a safe, responsible outdoor lighting… Read More

Why is Blue Light at Night Bad?

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New technical capabilities often come with unanticipated challenges. White LED lighting often has much higher levels of potentially harmful blue light. In 2010, IDA published its paper, “Visibility, Environmental, and Astronomical Issues Associated with Blue-Rich White… Read More

5 Popular Myths About LED Streetlights

Streetlights on city street at night create glare making it hard to see.

The rapid changes in LED lighting technology have given rise to an LED retrofit revolution. Across the globe, municipalities are opting to switch out their older street lighting to new, more energy-efficient LEDs. Unfortunately, these… Read More