In controlled doses, blue light can actually be helpful for your skin. "If you can't tolerate antibiotics or vitamin A products like Accutane to treat breakouts, LED therapy with blue light is a great alternative," says Schlessinger. "These blue light rays penetrate the skin to improve mild to moderate acne by killing the bacteria that causes redness, inflammation and breakouts. The Tria Positively Clear Acne Clearing Blue Light is one of the many blue light devices that uses blue light to target and treat breakouts."