I'd recommend the old magnetic ballast for stability in long runs and smaller price. To prolong its life, take into consideration a minimum air ventilation system. Advantages of the digital ballast are smaller heat emission and some offer the possibility to dim the lights.
bushwhacker Reviewed by bushwhacker on . digital vs magnetic ballast? I'm looking for people's experiences between the two ballasts as we're considering a 250W system for flowering next time. Heck, if we had the money magically appear in the next month we'd switch now I think! ;) Easier to deal with than a plethora of CFLs all over that have to be moved as the plants grow! How much of a difference is there between the two types? Heat? noise? How much longer do bulbs last in the digital ballasts compared to the magnetic? Rating: 5