Here’s how it works. The speed of light traveling through a vacuum is exactly 299,792,458 meters (983,571,056 feet) per second. That's about 186,282 miles per second — a universal constant ...

Smart lights are an easy way to save energy while adding a little flare to your home. Get started with CNET’s top picks. Originally hailing from Troy, Ohio, Ry Crist is a writer, a text-based ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. And it's not just useful for photography. You can also use a lightboxes to trace artworks, ...

The 'Before' star discusses her decades-long marriage to actor and author Robert Desiderio Sara Jaye Weiss/Shutterstock For Judith Light, the key to her thriving marriage is not caring about what ...

While dark mornings are inevitable in winter, turning the clocks back gives us an extra hour of natural light. At least 15 minutes' exposure to natural daylight, as early as possible in the day ...

All products featured on Architectural Digest are independently selected by our editors. However, when you buy something through our retail links, we may earn an affiliate commission. The first ...

You want a commuter light that's bright enough to ride in the dark: With an output of 700 lumens, the City Rover Power 700 has enough power to venture beyond the lit city streets. You want to ...

Red light therapy uses light-emitting diodes (LEDs) to treat medical and cosmetic conditions. Some people use it to reduce wrinkles, scars, and acne. It can also be used for dental pain, hair loss, ...

Light therapy lamps have been found to be an effective treatment for seasonal affective disorder (SAD). Seasonal affective disorder can bring on symptoms like depression, hopelessness, and fatigue, so ...