I just recently needed a lighting setup for a new bike I've gotten, and I did it before I found these forums. I looked at bike specific lights, and was very unimpressed with the price/performance ratio when it came to lights - I did some research, and found a good deal on a pair of flashlights - I got two of these for $52 shipped, spent $14 for six rcr123a batteries and a charger off ebay, and $5 for a helmet and a bike mount on dealextreme. I'm considering buying four more batteries for about six bucks, so I could throw 'em in my wedge pack.

Each light puts out 220 lumens for 2 hours, I've got one on my helmet and one on my handlebars. If I look like a dork because I have a "tactical" flashlight on my bike, I don't really care. I've got two 220 lumen lights so I don't die. Also, the eagletac lights don't have strobe mode, so I don't have to worry about that. All told I'm out $71, $77 if I decide to get more batteries so I have a four hour runtime instead of two. These are also waterproof, which is handy in Washington.

Also, these have a 14 hour runtime in standard mode if I need a "be seen" light without a "see" light.

I don't really feel any need to argue with people, this just seemed like the cheapest way to eat up some dark. And hey, if I'm going camping, I've got a couple pretty damn bright extra flashlights I can take with me. That's pretty cool too.

edit: In case anyone's curious, here's the two mounts I got off dealextreme and my ebay cheapie batteries. I've had good luck with the ebay batteries.

http://www.dealextreme.com/details.dx/sku.12000 (works good on the helmet)
http://www.dealextreme.com/details.dx/sku.15642
http://cgi.ebay.com/ws/eBayISAPI.dll...%3DI%26otn%3D2