thecanopy area could be 3x4 max. depth and width of table could vary a lot with methods of growing, shallow and wide or deep and thin... what type of growin you wana do? few big plants or many small ones? clones or seeds?....
bigger the flood table the better, more roots mean more buds, you want the table to flood about 1/4-1/2 of the table depth for 4-10 minutes every 4 hrs lights on and 2 short feeding during lights off