I have come to the conclusion that dollar per lumen, you are a lot better off buying a powerful flashlight and figuring a way to mount it to your bike. For about $30 you can get a super LED flashight and mounting hardware or maybe even two flashlights (on sale) that rival a $300 light set sold as a bicycle light.

I just bought a $10 super LED flashlight at the hardware store that rivals even the best and most expensive bicycle lights on the market at 30 times the price.

Batteries on a lot of todays good LED flashlights have such good run-time, there is no need to use clunky and expensive bike specific rechargable cells. If you really want to do the recharge gig, use standard rechargeable AAA, AA, or C batteries with a hardware store recharger.

I am all for buying bicycle specific stuff and supporting the bicycle industry, but the disparity in cost per lumen of bicycle lights vs. harware store flashlights is simply too great to ignore.