Hmm guess he can just go to any auto shop and buy the bulbs. They have different range of colour, from yellow to bluish to white and so on. Usually they have a colour chart for you to see. Anyway besides halogen bulbs that have a bluish tint, they also have plasma bulbs which basically produce white light and are brighter than the halogens one. Unfortunately they cost more. Installation should be easy, just check the vehicle manual.