im planning to use a 400wt switchable ballast light an trying to work the calculations on square footage i can lumanate leaves me scratching my head! wanting to do a SOG type grow in dirt,..i got a 42x8x10 area i can fix up to suit my needs with access to fresh air ,..i own my place so no land lord or nothing to worry bout! my nearest neighbor is a deputy but he's a good 1/4 to 1/2 mile away so i dont want any odors escaping for him to smell!!! im a pretty crafty person an building things my self is not a problem an enjoy it too! my only limitation is money,..witch we all face i suppose...thanks for any guidance an knowledge shared!!