i'm no wiz at this shock stuff, but i'd try a 12 volt or 36 breaker, you could get one from a junk yard out of most any car, but look for an newer semi, international, possably an camper or rv, the lighting your looking to run is very simalar to mobile wireing, i had wired my shed with car batteries and wire harnesses right from cars, yes it is ideal lighting, it loominates rooms more fully then any 110 glow wire. you can even use an old car headlight switch with the breaker. you don't need to leave the power on. oh yeah use the breaker or fuse panel from the vehicle so htis way you have a junction box and easy way to change fuses or breakers. good luck.