"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The Cosmo beauty team has pretty much tried every skincare device and tool out there—from high-frequency ...

LED face masks are one of skincare’s biggest at-home innovations, bringing light therapy – once limited to clinics – into our ...

In the world of high-tech beauty gadgets, LED (light-emitting diode) masks have become a regular — and more easily accessible — part of at-home skin-care routines. Gone are the days when the red light ...

Light-emitting diodes (LEDs) are so ubiquitous that it's easy to forget just how much society relies on these underappreciated technological wonders. Yet, the history of the LED goes back further than ...