I went the cheap route. Two of these rigs. (Although I bought the components separately, and more cheaply.) Maybe not enough run time from the rechargeable 14500 batteries, but they are more than bright enough. AA NiMH batteries will run longer, but not as brightly. These lights also come in a single mode version.

I keep a magnet stuck to the clip, to pull the batteries out without having to take the flashlight off the mount (which is difficult and can actually destroy the mount). I also carry spare batteries, as these go out quite suddenly when the lithium battery is discharged below a certain point.


Edit: One of these lights is bright enough. I just have this thing about symmetry.