There are a number of reasons why you might want to upgrade your headlights. The main reasons are: Improved visibility and Improved look for your car.

upgrade dull headlight
Dull and dim headlight needs to be replaced or polished source: Google images

Visibility at night can be a major reason to want to upgrade your headlights especially if your lights are getting dim due to age. The light can become yellow and dim resulting from scratches and dulling of the headlight cover.

Another major reason to upgrade your headlights is purely for aesthetics. Let’s face it, your car looks much better with new headlights.