This kit contains a Phantom 750W Digital E-Ballast with a Free 750W HPS Lamp (BUSD750GE).Hydrofarm's Phantom Digital Electronic Ballast is the most rigorously tested ballast on the market. The Phantom features silent operation, lightweight design, multiple placement options and the maximum lumen output around. We listened to your needs and learned. Now you can reap the benefit with this durable, premium digital ballast.Tri-mode, push-button dimmable feature gives you the light you need in your specific growing situation.Hot re-strike programming protects the lamp in the event of a power outageTested for compatibility with most brands of high intensity grow lampsDual resettable breakers—protects lamp and household circuitsOnly ballast on the market designed for vertical operation for coolest running and optimum grow spaceDrives the highest light output for maximum plant growthUniversal reflector adaptor and 8 ft heavy duty cord includedUnlike magnetic ballast, Phantom runs completely silentPatented lock & seal BAREF lamp cord installedInternal RF protectionTriple surface aluminum fins—most efficient cooling in its classInternal Resin coating protects components for long lifeNOTE: This ballast can be safely operated at any voltage between the range of 120V to 240V.