Hydrofarm Phantom Digital Ballasts feature cool silent operation, lightweight design, and the maximum lumen output available. 

These durable ballasts are wall mountable or can be used free standing vertically. There are triple surface exterior aluminum fins giving the Phantoms the most efficient cooling status in its class. Includes internal RF protection and patented lock and seal BAREF lamp cord that is factory installed. Internal Resin coating protects components for long life.

They are compatible with most brands of HID grow bulbs but SunPulse lamps are recommended by Hydrofarm. Phantom digital ballasts are built with a Hydrofarm-style plug, but includes a standard-style adapter so you can use any brand of HID reflector right out the box!

The Phantom line of digital ballasts has built-in hot-restrike programming to protect both your lamp and ballast in the event of the electrical interruption. The ballast will not attempt to restart a hot lamp for at least 15 minutes.

Dual resettable breakers helps protect lamp and household circuits. The Phantom digital ballasts come with a universal reflector adaptor and an 8 foot heavy duty cord.

Stats:

Phantom 1000W Digital Ballast - model PHE1THD - 120/240v Dimmable - 16.4 lbs

Phantom 600W Digital Ballast - model PHE600D - 120/240v Dimmable - 10.9 lbs

Phantom 400W Digital Ballast - model PHE400- 120/240v NOT Dimmable - 9.6 lbs

1000W and 600W Phantom Ballasts give you a tri-mode, push-button dimmable feature to dial in your specific growing needs. Power level settings of 60%, 75% and 100% are shown using easy-to-read LED lights.

More info (PDF format)