Ford's Focus uses a Halogen H7 bulb in its low-beam socket. Open the bonnet and remove the two Torx screws holding the headlight in place, then lift the headlight forward and out of the car. Unplug ...

Headlamps come in several sizes, shapes and types, as do their bulbs, which need periodic replacing. A majority of vehicles still use halogen headlamp bulbs, but a growing number come with ...

LED headlights throw extremely intense light with very little draw on your car's electrical system. Now that they're trickling down to the aftermarket, you can buy a simple plug-in "LED retrofit kit" ...