I like the UI of the TK40. Do you get a single AA Fenix light than works the same way? I cant find one. The small lights needs bezels to be turned etc. Its nice, but I want a mini TK40
I don't think that Fenix has got a light like that. You could take a look at Zebralight. They have only one switch but could give you a similar user interface.
Yes it does not have to be a Fenix. But all the functions should be in the tailcap like its the case with the TK40. Even a Solarforce L2 can do it, but its not a single AA light.
I would have prefered a Fenix but its not a must.
I think Novatac has something that can be programmed with 4 different modes all directly accessible through the switch from off. A little expensive, but I've been eyeing them for a while now.