I will be installing (10) 6 tube high bay fluor light fixtures in a new shop. Each fixture draws 214 watts for a total of 2140 watts. 2140W / 120V = 17.83A . I know I need 2 circuits, (one 20 amp circuit can safely carry 16 amps). But I would like only one switch to control all the lights. Is it possible? A 30 amp circuit isn't practical, is it? I have done my own wiring before, but never with this many lights. Thanks, Steff

A double pole single throw switch will work for this.

As Tev said, a double-pole single-throw switch can do the job, however, if you go to the hardware store and buy just any old double-pole single-throw switch, you'll probably get one that is shown below. The top image shows the inner connections is when the switch is in one position; and the bottom image shows the inner connections when the switch is in the other position.

These switches are used when you wish to switch a lamp (or other device) from more than two locations.

You will have to go to an electrical supply house to get a double pole switch that will look and work as a standard light switch.