I would think a light with a battery pack that goes into a bottle cage would be handier than one that straps to the frame. Is it because you want to keep your bottle cages open for water bottles, or is there another reason you like the strap-on batteries?

Some of you are mentioning MagicShine, from a place called GeoMan. Okay, I looked them up:
http://www.geomangear.com/index.php?...u8gfj1g5h7ka81

So what's the feedback on this?