The bulb has been alight longer than any human has been alive. It has outlasted at least 20 U.S. presidents. The union was ...

Philips Hue lights are usually expensive, especially if you get one of those retro ones. Today's deal makes the cost much ...

and like those old bulbs, the glass is easily removed with a ball-peen hammer. In place of the tungsten filament is an aluminum PCB folded into a squat obelisk. Sixteen 3.5 x 2.8 mm LED packages ...

We tested the low-beam performance of single-filament (9003) and dual-filament (H7) bulbs from GE, Hella, Philips, and Sylvania, and PIAA's dual-filament bulb. We also compared their performance ...

Salisbury EcoHub Alliance will be handing out LED low-energy lightbulbs at their Tuesday market stall from March 25.

The bulb glows because electricity flows through the thin wire inside the bulb called a filament and makes it hot. When the bulb gets old, the wire will eventually break, breaking the circuit and ...

Plot a graph of voltage, V on the y-axis v current, I, on the x-axis. For a filament bulb, voltage and current are not directly proportional as the graph is not a straight line through the origin.