The Convoy L2 can be run on one or two 26650 batteries and has a larger reflector than the C8 and more throw, come with XP-L Hi at 3A as a stockl light and is cheap, but don´t expect a monster throw out of the box ( I think 120Klux), but there are people who modded this light to be thre times the throw of the stock light.
Another option, but more expensive: Manker U21
Single 26650 light too.
Third option: Jaxman X1, a bit more throw than L2 out of the box with XP-L Hi.
K.