I've got access to 2 different batteries, a 12V 12AH and a 12V 7.2AH. They are a little bulky but at 240# I'm not really concerned with the weight.

My question is this:

What type of light system would you build and which of the batteries would you choose?
I'm interested in a very bright headlight (bar mounted) and some sort of red tail light.

Bike is an '06 Specialized HardRock Sport Disc and I usually ride for 2-3 hours

Thanks guys