Visible light waves vary in length from 380 nanometers (violet light) to 700 nanometers (red ... blue light. Instead, your eye may digest blue light as poorly focused visual static.

Argh! Sure, there are creams and serums and other skincare heroes that can help, but cutting-edge research suggests a new way to treat skin issues: red and blue light therapy. Both are forms of ...

Our intrepid beauty writer Rio Viera-Newton has covered some of them here, from Neutrogena’s highly Instagrammable light-therapy mask (which uses both red and blue light) to the handheld Foreo ...

“That’s why when we talk about blue light or red light, we’re not talking about a red-colored light bulb. It’s the wavelength of light.” We’re most sensitive to blue-wavelength light ...

You probably know that bright lights and the blue glow of electronics at night can hinder your sleep. Well, it turns out that red light may also affect your sleep, but in a potentially helpful way.