This ‘smart plug’ is the cheap way to smarten up a home, now 48% off

Turning your home into a smart home doesn’t have to break the bank if you know what to look for. One of the easiest and most ...

The best space heaters of 2025, tested in our drafty offices and bedrooms

The best space heaters quickly warm up a cold space. We tested 25 heaters from Vornado, Lasko, and Dreo rating warmth, energy ...

Are Incandescent Lightbulbs Making A Comeback? Here's What We Know

Despite renewed political talk, incandescent bulbs aren’t back. Federal efficiency standards still block them, and LEDs ...
Public Broadcasting Service (PBS)

Are ‘vampire devices’ draining energy in your home? Here’s what to do

Many people leave electronic devices plugged in when they’re not in use without a second thought. But everyday items that drain energy even when they’re turned off, like coffee machines, video game ...

The Best Chainsaw Sharpeners, Tested

Learn More › Regular use of a chainsaw sharpener can keep your chainsaw in peak cutting condition, allowing it to make ...
IEEE

Circular p-GaN/p-AlGaN Rods With Metal/Thin Dielectric-Type p-Contact to Increase the Wall-Plug Efficiency for 258-nm AlGaN-Based Deep Ultraviolet Light Emitting Diodes

Abstract: Very strong optical absorption and the poor hole injection efficiency make AlGaN-based deep-ultraviolet light-emitting diodes (DUV LEDs) encounter low external quantum efficiency (EQE) and ...