I've had a set of telescoping Bi-Xenon on my jeep for over a year now and have had no problems... They were an inexpensive set off of ebay and work great. When I flip the high beams on it is like daylight. The key to having them work correctly is removing the factory reflector. My kit had bulbs with a built on reflector and I had no clearance issues. Another important thing is to make sure you have a good ground connection, otherwise they will flicker, which after a period of time can cause failure. My total cost shipped was only $120