Originally Posted by
ItsJustMe
Just take a look at the runtime and the batteries. Anything that runs 30 hours on three AAA cells is a very weak light. The MagicShine couldn't run 15 minutes on 3 AAA cells.
If you're attracted to the simplicity of a one-piece rig rather than the wires of the Magicshine, take a look at P7 flashlights. About as bright as the MagicShine, a little cheaper. Nowhere near the runtime since they mostly use a single 18650 cell when the MS has 4, but that may not be an issue for you. And they're guaranteed waterproof, and come off the bike in 3 seconds if you need to take it off to avoid theft.
The P7 flashlights from Deal Extreme are okay. They work well and are pretty bright but they do have some problems. The mulitmode one I have is touchy about battery bounce and will change modes annoyingly often. I only use it as a helmet light to avoid that problem. The 2 mode is very rugged and doesn't have the same problems as the multimode. Not nearly as bright as the MagicShine, however.