i switch over to first 5 years back to SilverStar and then 2 years ago to SilverStar ULTRA lights. there the best i can do with the stock lamp house. here is some links for you to look at. (cost is $50 for two bulbs and well worth the cost.)
http://www.sylvania.com/ConsumerProd...on/default.htm http://www.sylvania.com/ConsumerProd...r/ProductLine/