ok, what would i do with that space if i split it horizontally, I'm assuming u have 8ft. of usable space. Hmmm, I'd split it 5 and 3 and use 4'flouros in the 3ft. part to veg and 2 400w hps in the 5' part. Splitting it vertically would be a whole other story in of itself, but if you want to keep it as simple as possible, then keep it as is and grow big plants.