Not too bad, I also run in a 2 x 2 and average between 4-6 oz a run. I use Vero 18 COBs, a diy built light that I run at 160w.
I should also mention I run in DTW coco that feeds once a day if I’m running 1 plant in 1 big pot or 2 times a day if I’m running 4 plants in smaller pots.