Hey Jamstigator - check out this thread.

http://boards.cannabis.com/growroom-...lbs-light.html

Tranoble got three pounds from essentially the same size grow as your 1000 watt set-up. (He had 4x1000w on an 8'x8' area for 12 pounds, but that's the same coverage as your 4'x4'.) Anyhoo, he pretty well has the SOG dialed in and his thread gives a lot of details, so it's a good read.

Good luck! :thumbsup:

PC :smokin: