This article is a part of CNN Underscored’s Guide to Age-Defying Beauty, a weeklong focus on the essential products, tips and tricks to enhance your glow at any age. We’ll be featuring editor-tested ...

*1: Among air-cooled UV LED with a total irradiation of 300 mJ/cm² or more; Kyocera research, March 2025. *2: Among air-cooled UV LED light sources for UV curing applications; Kyocera research, March ...

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 may earn commission from links on this page, but we only recommend products we love. Promise. Plus, many of these devices are hands-free, so you can lay back and watch the Bridgerton carriage scene ...

PureWow editors select every item that appears on this page, and some items may be gifted to us. Additionally, PureWow may earn compensation through affiliate links within the story. All prices are ...

These light-emitting devices are all over the internet. We asked experts if they can reduce wrinkles, clear acne and more. By Melinda Wenner Moyer You’ve probably noticed this scene on social media: ...

We developed a hybrid copper–iodide compound called CuI(Hda). It emits deep-blue light at about 449 nanometres and has an almost-perfect photoluminescence quantum yield — a measure of emission ...