Very interest in this thread. I have the same questions and concerns - there is a lot of choice and a wide range of prices, but how do we know which are the best? I have 2 Jeeps that always get MOT'd between Christmas and New Year. Currently, both have replacement LED bulbs in the existing 7inch round fittings. They've been installed for years and give a great beam pattern with a brighter, whiter light. I've been very pleased so a bit peeved that I might need to spend hundreds on replacing them. Then in the summer I've the got the 5.75inch units in the Caterham