The MLC-4XT Master Lighting Controller is the best device for controlling up to four HID lights from one time-clock or controller. You run 30 amp, 120/240 volt power into the MLC, and all of the outlets are controlled by one 120 volt trigger cable. You can plug the trigger cable into a standard 24 hour timer, environmental controller, or one of the C.A.P. HLC series of garden and lighting protection devices. The MLC-4XT has four Universal X-Plug outlets which allows for running your ballasts at 120/240 volt without having to change out your ballast power cords. The MLC-4XT has an integrated timer that allows you to control your MLC with the built-in time clock. The MLC-4s are rated for 30 amps @ 120/240 volt. 5 year no hassle warranty.