well since there hooked to a
pc most likely your going to be running 12 volt
DC, now some devices in a
pc get stepped down to different voltages via the power supply, but I would put my money on it that they are 12 volt. I would find an old 9 or 12 volt wall adapter lying around thats
DC and ry wiring them up that way, or if ya wanna get all mechanicla looking you can get a ATX power supply that has a switch for different voltages and wire them up that way. you could mount the power supply in your canopy ( if you have one ) and make it look really cool and expensive lol