(CNN) — Over two centuries ago, physiologist Jan Evangelista Purkyně noticed that red flowers looked bright carmine during sunny days but appeared to change to a deep muted hue come nighttime. The ...

Artificial light at night can have a disruptive effect on bats, but not if the light is red. Switching to red light may therefore limit or prevent habitat loss for rare, light-shy bat species, report ...

All the colors of the rainbow are beautiful, but red has recently caught the attention of the masses — in particular, red light. Hailed by users for its wide-ranging aesthetic and therapeutic uses, ...

Hilton Head Island’s “lights out” ordinance is in effect May 1 through Oct. 31 each year to help protect local sea turtles during their egg-laying and hatching season. This puts a stop to using ...

Dermatologists explain the science behind wildly popular treatments like red light therapy, which is now available at home—for a steep price. Full-face LED masks like this one can cost up to several ...