Blue light usually comes from the sun but also from digital screens and LED lights. Some experts believe artificial sources may be causing eye damage in humans, but animal studies are inconclusive.

The Blue Line Extension is set to connect the existing Blue Line light rail 13.4 miles north to connect North Minneapolis, Robbinsdale, Crystal and Brooklyn Park to the regional light rail network.

There’s no question construction of the 13.4-mile Blue Line light rail extension will affect property owners, businesses and renters along the route. But so far, many of them say they want more ...