^^ what he said
if you look on ebay, you can find comercial pumps that will supply ten lines (35-80w) for 50-100$ shipped. if you plan on going with individual buckets in the future, one of these would be a great investment.
also, are you growing from seed? if so, you may want to rethink your plan; by the time the plants show sex, the roots will be a tangled mess, and you won't be able to sepparate, and even if you do, some of the male's roots will stay in with the females, and eventually cause root rot.
i only do more than one plant per container if i'm using slips, and even then, i'd only do it with a 100% indica.
sativa's, due to size, should also have thier own bucket, imo.... consider 5g buckets instead of the rm tote.
kp