The MLC-16 and MLC-16a represent the latest in large scale lighting control. They are the best devices for controlling up to 16 lights from one timer or controller. You run 80 amp power to the MLC, and all of the outlets are controlled by one 120 volt trigger cord. You can plug the trigger cord into a standard 24 hour timer or lighting controller. The MLC-16 features standard 240 volt style (NEMA 6-15) outlets, which your ballasts are plugged into. The MLC-16a uses 120 volt style (NEMA 5-15) outlets which allows for running your ballasts at 240 volts without having to change out your ballast power cords. The MLC-16 contains 4 banks of 4 lights. Each bank of 4 lights is protected by a 20 amp circuit breaker. The MLC-16's are rated for 80 amps @ 240 volts. ALWAYS CONSULT AN ELECTRICIAN BEFORE ORDERING.