Tucson’s skies are slightly darker thanks to the completed streetlight conversion project, according to a study by the Tucson-based International Dark-Sky Association. The study, however, was limited ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Rory Evans Rory Evans is a writer focused on skin-care and beauty products.

After a years-long planning process, the next few weeks will see the first phase of NorthWestern Energy’s plan to replace all streetlamps with LEDs go into effect, said NorthWestern spokesperson Butch ...