Do yourself and others a favor and get a real goddamn light! Your Knog ain't cuttin' it 'bro'! After almost T-boning your dumb ass tonight on my tour MTB with full racks and a load coming home, it was you who would have been hurt, BAD! I outweigh you and my bike alone is pushing 40lbs unloaded...you would have been hurt and I would have been pissed! But you run a big chance of getting mowed down. Maybe not by me but by someone who didn't see your roachey little light. New batteries would be nice too...maybe one with more power than a watch battery?
Since I'm ranting, how about taking your 'whip' farther than just the same 5 square miles? Denver is flat. Enjoy it! I won't mind riding with you and we would likely take the MUP ('cause they are nice here, we're spoiled) out to Chatfield/Cherry Creek/ Morrison or SOMEthing! Get out of the city for gods sake! An easy 30-40 mile round trip...
Normally, I could care less what you do but even I would have felt bad bending you and your bike when it was so easy to avoid...
If your local, keep an eye out for the gorilla on the fixed Panasonic conversion...with lights.