Originally Posted by
Turtle Speed
The RedZone 4 is in a class by itself as a helmet light because of its omnidirectional flash. Unfortunately, it's also in a class of its own in terms of cost ($100).
You can find great info on the RedZone 4 by searching the Electronics, Lighting, & Gadsets subsection of this forum. (And the candlepowered forums too.)
mechBgon has the RZ4 and has posted a couple of vids on youtube about it. Unfortunately, they are currently out of stock through the manufacturers online store. Probably more powerful than what the OP is looking for...