A projector beam headlight is a light that is placed within a "projector bowl" casing that projects all the light being generated through a projector lens. The projector bowl is typically made from metal and is finished in chrome paint so it can generate a stronger, focused light.
Light that is projected from the projector beam headlight hits a piece of metal shaped like the light pattern to be projected onto the road. In some car types, this projector metal can be removed and replaced. As of 2014, some car owners have modified older cars with a projector from more recent cars to retrofit projector beam headlights.