Phantom Double-Ended Ballast: Commercial Phantom DE technology drives maximum PAR value. This Phantom ballast is designed with a high precision microprocessor that makes it totally silent, lightweight, highly efficient, and extremely reliable. 277 voltage for the industrial, commercial double ended lighting operations where keeping the ballast and its heat near the ceiling or outside the grow room keep electricity and HVAC costs down. Phantom DE 1000w 277 Ballast Specifications: High frequency design optimized for double-ended 1000W lamps High-precision microprocessor control Four-way dimming: 60%, 75%, 100%, and Super Boost (up to 1150W lamp output) Robust commercial design Superior reliability LED status indicator Internal RF shielding Patented ignition control End of lamp life signal Auto restrike feature protects valuable lamps from damaging power interruptions Cooling fins for maximum heat dissipation Suitable for use in Damp locations Specifications Rated Wattage: 1000 Voltage: 277 Warranty: 3 Year Bulb(s) Included?: No Ballast Type: Electronic Rated Amperage: 4.5 Frequency: 60Hz CSA Certification