Koffee
I know how you feel, I'm tired all summer until we get that hour of sleep back in November!
There is tons of information on the web about bicycle lighting, rechargable batteries and being visible. check out this site for more than you ever wanted to know about bicycle lighting:
http://nordicgroup.us/s78/
Do a google search on homemade bicycle lights and you will find lots of good info.
Be safe.