End of Lamp life, short circuit, open circuit, ignition failure and thermal protections for safety. Ballast Specifications: Wattage: 315W Input Volt: 120V/240V Input Current: 2.89A / 1.42A Input Power: 343W Min Power Factor: .95 THD: UL listing and multiple ballast protections such as ignition failure protection offer safe usage for your indoor environment as well maximizing the PAR output of your Ceramic Metal Halide lamps. Details Prism Lighting Science Ceramic Metal Halid Ballasts are designed to run 315W CMH lamps safely and effectively. The Digital Greenhouse 315 watt ceramic metal halide all in one fixture provides a high-performing and economical CMH lighting solution for any indoor growing application. Featuring advanced square-wave ballast technology and a super-reflective 4-sided ho Low Mains frequency 50/60 Hz, and square wave type. Hydro Crunch 315-Watt Ceramic Metal Halide CMH Enclosed Style Grow Light System The Prism Lighting Science CMH Ballast was made to have all the features and technology needed for optimal performance with none of the expensive frills in order to keep it priced as competitively as possible.