augi, l had this setup along time ago, and posted pics of my lighting system.
12v 7amp battery
12v 20watt halogen light bulb(imo the 55w and 35w are too much of a draw on the battery)
basic on/off switch
good lighting system, you will be able to see everything in front of you.
the only bad thing about this setup is, once you have a short, there goes the whole system. im still working on something better.