Voltage on cold cathodes are 12 volts. You can use a voltage regulator or a resistor to control the voltage. The cold cathodes create a great amount of light without the dangers of neons. Also a 12 inch neon will cost around $20 where a dual 12 inch cold cathode kit can cost from $3.99 and up. Average price around $7.99 for a dual kit.

For the hook up, you'll have to be more specific on how you are going to using the lights. I can hook you up with a schematic drawing on how to hook the lights up for what you want them to do.