Wearable health devices, such as smartwatches, have become commonplace, enabling the continuous monitoring of physiological ...

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 ...

Researchers in Sweden have unveiled a way to create high-performance electronic electrodes using nothing more than visible light and specially designed water-soluble monomers. This gentle, ...

Photoplethysmography (PPG) is an optical sensing technique that measures blood volume changes and underpins devices ranging from hospital-grade pulse oximeters to consumer wearables that track heart ...

Nanoleaf execs have long teased the idea of smart lights that are “actually smart” rather than just “a glorified remote control,” and at CES in Las Vegas this week, the company is finally putting its ...

Presence/motion sensors are one of the best ways to make automations feel more natural, but most of them run on batteries and eventually have to be swapped. That’s one of the main reasons I really ...

Scientists have developed a fully transparent skin sensor that accurately measures UV radiation, detecting light and converting it to electrical signals. So when the Sun's rays reach damaging levels, ...

Epson has launched a series of 4K and 1080p projectors called Lifestudio, which range in price between $680 and $2,700, and feature a new 3LCD light engine. These lifestyle projectors are mostly for ...

What just happened? Researchers at University College London have developed a new type of solar cell capable of efficiently generating power from indoor light, a breakthrough that could reduce ...

Contrary to popular belief, most property crimes—including burglaries and package theft—happen during the day, not under cover of darkness. But night still brings unique challenges: fewer people ...

Dutch tech scaleup Optics11 has launched an underwater monitoring system that uses light waves to “listen” for the presence of foreign objects. Called OptiBarrier, the system can detect enemy ...