Omega MDF Lighting Timer Boards with Fan SocketsProfessional Grade Grow Light Contactor Timer with Fan Sockets The Omega MDF Lighting Timer Board is a professional grade solution for safely controlling your grow lights and fans from one central unit. Built specifically for high load grow room setups, it uses an integrated contactor relay system to handle the electrical demand that standard plug in timers simply cant cope with. If you're running multiple lights, this is the safest and most reliable