How Do Projector Headlights Work?

Projector headlights consist of a headlight assembly with a replaceable bulb, just like reflector headlights.

They also include a reflector component, but that’s where the similarities end.

A diagram illustrating how projector headlights work.

Projector headlights have a lot of benefits, and only a few drawbacks.

Brighter than reflector headlights.

Less likely to cause night blindness in other drivers.

More even light pattern and fewer dark spots than reflector headlights.

They cost more than reflector headlights.

The headlight assemblies tend to be deeper and take up more space.

Improperly retrofitting an older vehicle can be dangerous.

Do not install projector headlight bulbs, like HID bulbs, in reflector housings.

The assembly then needs to be resealed.

Model-specific and universal projector headlight kits are both perfectly safe as long as they are installed correctly.