Feature

Light Impacts

Hue and timing determine whether rays are beneficial or detrimental

By Janet Raloff

- More than 2 years ago

This is part two of a two-part series on lighting’s environmental and human impacts. Part I: “Illuminating Changes,” is available here.

DROWSY-NOT! The bluish light emitted by computer screens may be sabotaging sleep schedules in teens who work late into the night. The hue might signal the biological clock that it’s morning.