I have been wanting to get a Fenix or 2 to try out for the bikes. Saw their newest one on the website and it seemed to be just what I was looking for. Listed as 109 Lumens on 2AA batteries, 3.3 hr run time and the beam goes out 100m. Unlike their others I looked at, this has one mode and a simple click on, click off.
I bought 2 bike mounts as well, which seem to hold things in place pretty well. Now my rechargeable batteries just need to get here so I can try these things out.