Once upon a time, buying a lightbulb meant choosing an incandescent one of between 25 and 100 watts, depending on how bright you wanted the light to be and the fixture you were putting it in. You ...

This article was featured in One Great Story, New York’s reading recommendation newsletter. Sign up here to get it nightly. The lightbulb was flickering over my head. Not the idealized cartoon ...

The global LED face mask boom did not arrive quietly. Social media turned red light therapy into a beauty ritual, celebrities posted glowing selfies and at-home devices began appearing everywhere from ...