High Intensity Discharge (HID) bulbs are now being fitted as standard to many vehicles. They give bright, white light output - and have a long life (around 3000 hours). Unlike conventional auto bulbs, they don't have a filament, so they aren't as easily damaged by the vibrations from your vehicle. This mean less downtime replacing bulbs, and more time on the road. HIDs require specialist fitting - see here for more details.