VIVOSUN Ultra Bright Compact 1000 Watt Digital Dimmable Electronic Ballast with Soft Start Technology and Built-in Fan for Hydroponic HPS MH Sodium Halide Grow Lamp Bulb Light (ETL Listed, USA Brand) Provide consistent, stable power to the lamp for ultra bright, high intensity and a quality spectrum. Exclusive Technology: "Soft Start"-allows multiple ballasts to start at the same time."Slow Light Start-up"- a healthy way to starup the bulb and reduces risks of premature failure of bulbs. Strike both metal halide and high pressure sodium bulbs, compatible with Double Ended lamps. Can withstand a wide range of voltage fluctuations from 98V to 268V and still supply a constant voltage to the lamps What You Get: VIVOSUN ultra bright 1000w digital ballast, 8ft 120 Volt Power Cord, four Rubber feet, ETL certified guarantee, our fan-favorite 2-year warranty and friendly customer service.Note:Packages are updating,you may receive the ballast without the LOGO.PLEASE THINK TWICE BEFORE PLACING ORDERS!