everybike light i've owned has been crap...
this time around i bought some cheap led flashlights
they are pretty good
here's a pic
http://i33.tinypic.com/zltd6w.jpg
stock 3xaaa
http://i35.tinypic.com/2po8h89.jpg
modded to 6volts...both pic's only one light on
http://i37.tinypic.com/2w553ex.jpg
i replaced the 3aaa with 2 3v lithium cr2's from dollar store
in future i will get rid of most of the lights body
and only use the front part sealing the back and wiring
to a switch and battery
i will probably glue them on my bike(the size of a plastic pop cap)
anyways if you look at them you will look away there that bright

just thought i'd share

thx wasp