The brightness of light is measured in lumens and a halogen bulb puts ... ruled all cars in the U.S must have seperate high beam and low beam bulbs. “So that negates these smart headlights.

He has no trouble lighting his path with this 1300 Lumen bike light he built. The light source is a 3-up star by Cree. It puts off a lot of light, but also generates quite a bit of heat which is ...