Have the switch control a relay that way you don't have much amperage pulling at
the switches and you can add more lights to that circuit if the relay you use can
handle the load that is.
http://www.skycraftsurplus.com/index...TS&Category=95
They got the bosch type relays all the way up to 80 amp if you needed it or that 300
amp relay solenoid if you wanted to overbuild it for who knows what!!