In the light-action of the lamp itself, the electric current, in pass-ing through the magnet, A, attracts the armature, B, thereby drawing down the end, E, of the over-head lever, and elevating ...

Efficiency is the comparison of the amount of light (lumens) produced by a given amount of electrical energy (watts). The more the lumens per watt the more efficient the bulb. The averaged ...

It's not LED light, but paint. And not just glow-in-the-dark paint, but a special kind of paint that turns on and off by reacting to an electric charge. It can be applied to any surface in any ...