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About Ballast (MH or HPS)
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10-26-2008, 07:16 PM
Anony
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Join Date: Dec 2005
Posts: 7,871
Re: About Ballast (MH or HPS)
40 plants?
Its always good to get mh and hps, but wattage and how many depends on how much room you have and how many plants.
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