Fairly bright for urban riding, $60-$100, USB rechargeable bike specific headlights and tail lights are now readily available. They don't look too bad, and are fairly easy to use.

A kickstarter proposal, the bike helmet design having front and back lights integrated into its shell, looks interesting, though the shell doesn't appear to have enough ventilation. I'm hearing a lot from family about how helmet mounted lights help people riding to be seen, but I've so far resisted the clunky flashlight strapped to the top of the helmet route.

http://www.kickstarter.com/projects/...ights?ref=live