400W dimmable electronic ballast

400W dimmable electronic ballast High power 400 watts Built-in heat output holes. Built-in cooling Fan Built-in standard reflector interface Fit for 400 watts High Pressure Sodium Lamps or 400 watts Metal Halide Lamps Pass FCC and CE Certificate Low Noise Energy saving and environmental friendly Stabilize input power and output luminous flux Reduce wastage and improve usable efficiency of power supply equipment capability Shielded component to protect against Radio Frequency Interference to other equipment Prevent the electricity from striking the bulb repeatedly and make the bulb nigrescence prematurely Protect your eyes when continually working 3 Dimming Option: 250W; 400W; 150W or 50%,75%,100% power output. Specified Frequency: 50/60Hz Working Voltage Range: 120V/240V Aprox 11in. x 4.5in. x 2-3/4 in. With a 7ft. power cord to wall (US standard plug)