If your car came from the factory with halogen or HID bulbs, you’re going to need to replace them or upgrade them down the line. Both of these bulb types lose light output over time; thus, even ...

So with that in mind we conducted a test to find the best headlight bulbs of 2018. All the bulbs tested were H4 double-filament specification: halogen headlamp bulbs that produce both low and high ...