The Advanced Control Unit is a professional timer & contactor system for turning on 12 x 600w lights.
Design and build quality are the watchwords here.
This system will turn on 12 x 600w lights in groups of 2 with a 25 second delay between each group.
The benefit of this is that you do not have a large start up power surge by turning all the lights on at once.
This is relevant as a light typically requires about 20% extra ampage to 'start up' as opposed to when they are up and running.