When gardeners upgrade to a Lumatek Digital Ballast, they'll see the benefits instantly!

From their increased efficiency to their increased lumen output, digital ballasts truly are the next big leap in indoor gardening technology. Compared to traditional magnetic ballasts, Lumatek Digital Ballasts lose less power from outlet to lamp, provide light at a far more stable level, start up faster (full light in under one minute!), and reduce the noise a system generates by running silently. These low-weight ballasts are internally RF-shielded to minimize electrical interference, they produce far less heat than their traditional counterparts, and short-circuits trigger a power cutoff as a safety measure. As if all that weren't enough, this 400W 120V/240V Lumatek Digital Ballast also lights both HPS and MH lamps for the ultimate in versatility!

NEW FEATURE!!! Now, all Lumatek Ballasts are dimmable! Not only that, you can overdrive your bulbs with the additional "Super Lumens" feature with the flip of a switch!

Fires 250W and 400W bulbs.

DON'T FORGET TO GET YOUR SOCKET ASSEMBLY!!! :o)