Yield Expectations??? for ebb and gro, indoor, 1000 watt HPS....

I know there are a lot of factors that play a part in yield, so I'll explain my setup, nutes, and strains I'm growing. I have a 12 pot ebb and gro under a 1000 watt light, I'm using the general hydroponics gro and bloom as nutes, and cha ching for late flowering. The temp has been maintained at 67 F throughout the whole grow so far. I strains I have are... White Widow x Northern Lights (x3), God Bud (x1), Sweet Tooth (x1), NYC Diesel x Sour Diesel (x3), Moonwreck (x3), Lemon Kush (x1) = 12 total plants.

What should I expect to yield if everything goes well and I do everything correctly with my current system? The 1000 watt is about 2 ft from the tops of the plants now which have been vegging for 1 week now. I'm not using co2. I'm going to veg for a full 30 days, and then flower to each of the strains potential. Any help or information would be helpful! Thanks!

generally worst case scenarios mean you'll get on average .5 grams per watt of light meaning 500 grams. The better you get the more CO2 you use the better the yield.