Some Questions about my newest project.

[bigsby]

Now when you say I won't need as many lights if I hang them vertically, if I positioned these lights absolutely perfect, how many could I get away with? Right now I'm looking at 6-7 1000w (I assume that's as high as I can go) HID's, but I don't know whether it's gonna be MH or HPS. With seven lights, the ducting is gonna be crazy.

Run some searches. I can't answer your vertical light questions with any authority but there is plenty written about it. Use google to search these and other forums like this:

vertical HID "cool tube" or cooltube site:cannabis.com

Play with the search terms. Search other sites.

I'm going to say that hung vertically you could probably step down to 6 or 7 600w HIDs. The general rule is that you place the plants around the lights in a 2' radius so that's four feet / light. You will be growing bushes so figure 2' per plant as well.

Let us know what you learn!