KenStanley-
I used a Maristar for a couple-few years. You'll be using double-ended bulbs, which means they are more than likely going to be HQI-rated. So your best bet is the Blue Wave 7 HQI ballast. Running electronic ballasts might save a little on energy costs if that is really important. But you would not be running most DE bulbs to their rated wattage, meaning they may not produce exactly the intended color and maybe wont last quite as long.
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"One day, someone showed me a glass of water that was half filled. And he said, "Is it half full or half empty?" So I drank the water. No more problem."
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