I'm in the north... did a 16 site with 5 gal pots 100 gal rez... no chiller great quality, about 2 grams per watt 2 1000w HPS ... no stinky slimy water. Keep your temps between 72 and 77 F. Choose your nutes wisely!!! (Note: it was winter time)
I'm by far not the strongest weed in the dispensary, but every time I use a 1000w HPS (s) and my climate is under control, I get 1.5 to 2 pounds per plant. Of course that's after a 2 month veg and some super cropping / defoliation (plant huggers don't be mad). The quality is extremely good as...
Was thinking about doing a run outdoors next year but F that! It's just too much to deal with. Only bug problem I ever had was fungus nats and a little peroxide and some sticky traps took care of that in no time.
4 Gavita Pros turned down to 600w 22k Btu of cooling a co2 generator at around 1400 btu and my electric bill only went up 150 during veg and 100 during flower. I don't think that is that bad for the results... almost 80 ounces :)
At the end of the day the PowerVeg looks like its only going to give you 5k lumens per bulb at best. I personally veg under T8s for a few weeks then throw them right under a coupe of 600w HPS lights then I work them up to 1000W. I know T8s have less lumens but they run a lot cooler...