Discover how to build a simple DIY projector using everyday materials like cardboard and a small flashlight or laser pointer.

Explore how a basic LED can be used as a tiny solar cell, generating measurable voltage under sunlight. This hands-on ...

Vacuum ultraviolet (VUV, 100–200 nm) light sources are indispensable for advanced spectroscopy, quantum research, and ...

Many cities are replacing their incandescent traffic lights with LEDs, despite the higher initial cost. Here's why that's ...

Dr. JeFreda R. Brown is a financial consultant, Certified Financial Education Instructor, and researcher who has assisted thousands of clients over a more than two-decade career. She is the CEO of ...

Tonawanda plans to buy the town’s inventory of 6,054 street lights and convert them to energy-efficient LED technology.

Welcome to Edition 8.24 of the Rocket Report! We’re back from a restorative holiday, and there’s a great deal Eric and I look forward to covering in 2026. You can get a taste of what we’re expecting ...

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 ...