Xenon bulbs are one of the most efficient lighting systems for the car headlights. These produce very high amount of light imitating sunlight which makes them very efficient option. These lights contain xenon gas and provide much better visibility to the driver. One disadvantage is that they produce a lot of glare which can be very uncomfortable for the incoming vehicles. HID Xenon kits and replacement HID bulbs are easily available at reasonable prices for your vehicle.