It is HID ballasts galore here at HTG Supply. We carry 250w, 400w, 600w, and 1000w ballast to drive the grow bulbs of your choice. HTG Supply stocks horticultural grade old-school magnetic ballasts and new-wave digital ballasts, both designed to maximize the light energy your plant receives from your fixtures. Magnetic ballasts are tried and true technology, with decades of street-lamp driving under their belts. They’re cheap, but also heavy, noisy, and run hot. On the newer side of the equation, we have digital ballasts. With solid-state circuitry designed to push your HPS and MH bulbs to their absolute limit, digital ballasts run more efficiently, generate less heat, and have a slightly higher output than magnetic ballasts. Take a peek at our offerings HID ballasts and get your grow on today!