Hi Ian, these are described as Cree LED bulbs, with an E10 fitting. I did buy two from different suppliers, but they are similar. I also have on in my flat torch with a reflector, and that gives a beam with brightness concentrated in the middle. I appreciate now that the bull's eye lense gives an even and bright light distribution.
http://www.ebay.co.uk/itm/NICELITE-L...p2056016.l4276