well i would buy the 1000w if i could aford it, i am kinda steaching my packet book as it is with them two sets,

and would there be light at the bottom of the plant if i where to hook the whole room up with some maylar?

also i for got to add this, if i where to buy one of them sets there, and then later on in the future could i just buy a 1000W bulb or would i have to just buy a whole new system?