These light-emitting devices are all over the internet. We asked experts if they can reduce wrinkles, clear acne and more.

TriChroma LED tech will lose some light too, but nowhere near as much — and in fact, the 116UX that Hisense announced has a ...

WSJ goes behind the scenes with one LED company, PixMob, to see the tech behind the wristbands. Photo illustration: Madeline Marshall ...