The Sun System® Pro Hort™ DE 1000 Watt Commercial Fixtures combine with the Sun System® 1's reliability and Etelligent™ controllability. This commercial greenhouse fixture is designed and assembled with premium components and superior construction for the professional horticultural enthusiast. Thermally optimized non-air cooled aluminum ballast housing does not require a cooling fan. Advanced 105 kHz microprocessor is designed specifically to drive DE lamps at a sustained peak performance. Internal ballast programming will protect the fixture in instance of open circuit, short circuit, over/under voltage or high temperature exposure. Features internal built-in circuit breaker. The Pro Hort™ DE 1000 Watt has dimmable/selectable wattage, turbo and built-in green LED lights for easily identified self-diagnostic performance codes. Low current, staggered ignition delay feature eliminates circuit inrush overload and protects lamp for increased lumen maintenance. Our optic is engineered for high performance based on proven, patented designs. Features UL listed double-ended sockets. Unique double-ended construction allows for maximum optical efficiency and uniformity. 95% reflective textured PVD aluminum delivers excellent uniformity, output and diffusion. Improved spectrum DE lamps used in this fixture focus on the red component for increased photosynthetic response. Includes Convertible Smart Volt™ Dual Ferrite Power Cord 120-240 volt 6.5 ft with 120 and 240 volt plugs. 277 volt fixture includes a hard-wired 8 ft 277 volt power cord with a L7-15p 277 volt twist lock plug. 480 volt fixture includes a hard-wired 8 ft power cord with a L8-20p 480 volt twist lock plug. 277-347 volt fixture includes 8 ft cord with a L24-20P 347 volt twist lock plug. Compliant with both FCC Article 18 Part A (governs commercial use) and FCC Article 18 Part B (governs residential use) as tested by an independent US testing lab in a true as used configuration.