If you search for Cree (they are the company who make the LED bulbs) then you get a good selection.Any links? or advice on what to search for... And was it UK shipped? I fancy some decent lights but I've read reports of people waiting weeks, sometimes, for goods to ship from wherever DX is based.
I chose to go with the "nitetrider" brand, as they have a fairly good rep and the battery pack they come with is Samsung, so should hopefully last better than some others. I posted a link to the one I bought on here. It was delivered from the UK and cost £59.99. The light is/was being sold for £120 elsewhere.