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Symmetry Magazine (12 September 2017)

9/12/2017

Clearing a path to the stars

At a January workshop at the annual American Astronomical Society (AAS) meeting, astronomer John Barentine sought to share stories of towns and cities that had successfully battled light pollution. Barentine is a program manager for the International Dark-Sky Association (IDA), a nonprofit founded in 1988 to combat light pollution. He pointed to the city of Phoenix, Arizona.

In 2015, Phoenix began testing the replacement of some of its 100,000 or so old streetlights with LEDs, which the city estimated would save $2.8 million a year in energy bills. But they were using high-temperature blue LEDs, which would have bathed the city in a harsh white light.

Through grassroots work, the local IDA chapter delayed the installation for six months, giving the council time to brush up on light pollution and hear astronomers’ concerns. In the end, the city went beyond IDA’s “best expectations,” Barentine says, opting for lights that burn at a temperature well under IDA’s maximum recommendations.

“All the way around, it was a success to have an outcome arguably influenced by this really small group of people, maybe 10 people in a city of 2 million,” he says. “People at the workshop found that inspiring.”

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Arizona Public Media (5 September 2017)

9/12/2017

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Lights Go Out at Kartchner Caverns, Newest Dark-Sky Park

“Dark skies also means preservation of natural darkness on the ground, and we know that that feeds into a lot of our understanding of the wellbeing of wildlife and the ecology, and ourselves as human beings,” said John Barentine, IDA's program director.

“There’s something that literally everybody could do to help support this effort. It’s as simple as looking at the outdoor lighting on your property if you are a homeowner, for example, making sure it’s shielded and directed down to the ground, that it’s only operating for the appropriate length of time at night.”

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Media Appearances

Symmetry Magazine (12 September 2017)

Clearing a path to the stars

Arizona Public Media (5 September 2017)

Lights Go Out at Kartchner Caverns, Newest Dark-Sky Park

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