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.
INCOMPATIBLE with bulbs HX57816 and HX57805
When using at 240V, do not use with timer TM01240, also known as the Intermatic HB112. You must use the TMHDT104, or a lighting controller, such as the APCL4240.