1000w each? You are DEFINITELY overdoing it. You only need probably two, MAAAAYBE 3 of those in there, but probably not. They will still bush out perfectly if you listen. But you need to remove most of those lights, for your plants' sake, and your wallet's sake. NO ONE uses 1000w of HID per plant. Not only is it completely cost ineffective, it can potentially harm or stunt your plants to death.
Trust us, man. You are WAY overdoing it/doing it wrong. Photoinhibition will fuck your grow up, not to mention the heat.
I can't imagine what a 10kW per hour bill looks like. Let me do the math.