zebralight - it already comes witha nice lookin headband, and some other extra stuff. very lightweight
h501 - single AA cell
h501w - same but in warm tint. ive had both and would recommend the warm tint.
they also make a single 18650, and if im not mistaken one that uses a single cr123a.
h30 and the h something. cant remember. (been drinking)
these are actually headlamps, but can be used in so many different ways... awesome flood light. worth every penny.
ive used it at work , its very secure on the head, doesnt get in the way at all. lightweight, can be pointed easily as well.
i got mine from illuminationgear.com
good and fast service. theres also a discount for cpf members.