Whats the largest area you can use for a 1000 watt hps. I have heard about 5 by 5, but i have also heard people say that they grew a 8 by 8 or even a 10 by 10 room with good results.
i would say a 4x3 is smallest you want to go...keep in mind you want 65-80W/sqfoot..so 8x8 is probably too big...biggest i would go is...4x4 with a 1000W HPS u gota watch heat too so make sure u got good ventilation