with CFLs your gonnna want aboout 70w per sq. ft. of floor space... so if your growbox is 12" wide x 12" deep thenyour gonna want 70w... multiple how amyn in ches your space is widde by how many inches your space is deep... then divide that number by 144... and multiply
that number by 70and thatshow many watss of light you need....
example:
for a grow box 15" wide x 14" deep...
15 x 14 = 210.
210 / 144 = 1.45
1.45 x 70 = 101.5.
therefor a 15" x 14" box will need 100w of floueent light...
