The Medusa Series of digital flipping and lighting controllers solves the headaches traditionally associated with lighting flippers. Not only does the Medusa Series flip lights, it's also a lighting controller, essentially being two products in one. Your ballasts and reflectors all plug into one unit! The digitally based design of the controller allows for the Medusa to properly flip and control your lights. An easy-to-use trigger cord is plugged into the Apollo? series timer (included) to control the switching between light banks. When powered ON, Medusa is powering Bank A by default. Once the trigger cord has been activated according the user-defined timing pattern, the digital part of the controller goes to work. With precision timing, the Medusa will turn OFF power to the ballasts, switch the relays to Bank B and then reapply power to the ballast (light Bank B.) This controller also incorporates Titan Controls? patent pending top off design for easy installation. Features a powder-coated steel enclosure that is designed for the harsh gardening environment. When failure is not an option, use Titan Controls?!