Dermatologists explain the science behind wildly popular treatments like red light therapy, which is now available at home—for a steep price. Full-face LED masks like this one can cost up to several ...

It turns out the "10-year lifespan" printed on your LED box is often a total fantasy. I spent years falling for the marketing, only to end up standing on a ladder every six months replacing bulbs that ...

More than one-fifth of US electricity is used to power artificial lighting. Light-emitting diodes based on group III/nitride semiconductors are bringing about a revolution in energy-efficient lighting ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Rory Evans Rory Evans is a writer focused on skin-care and beauty products.

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Nancy Redd Shifts in the number of daylight hours — due to changing seasons or ...

Abstract: One of the main reliability issues in power LED devices is the bond wire connection due to wire neck breakage. Time consuming thermal cycling or thermal shock tests are the standard testing ...

All your files, apps, and settings are on your old computer. Here’s how to move them to your new Windows PC, from either Windows or macOS. It’s great to get a new computer, but it’s not so great to ...

Abstract: The three-phase Vienna rectifier suffers from the inherent problem of increased or unstable output voltage on the dc side at light loads. In this article, a light-load state judgment ...