This controller will run four (4) HID lights at 120 Volts ? maximum 4000 Watts. The only lighting controllers featuring industrial-grade ballast rated relays. 120 Volt accessory timed outlet to activate in-line fans to cool your lamps. Plug relay trigger cord set into 24 hour wall timer. Four (4) NEMA 5-20 outlets. Removable back panel makes controller easy to wire into your power system. On/Off switch that makes lamp replacement easy. Durable powder-coated steel enclosure. 50 Amps input power/40 Amps output power/120 Volts/60 Hz./4000 watts. Patent No. D660,252.