i would advise taking some time and a small sheet of plywood and attaching some of the round porcelain light fixtures (rated for 200w btw) from HD. they cost a couple bucks each and take a lil bit of time to wire up.. be careful and dont kill yourself!! put a splitter in each of 5 of those and you will have enough light to fill the space you have and if you dont just add another couple fixtures. sound like fun??
when i get the time i will make a DIY guide for this..
-J