That's a lot for one 600, yikes! I was on care and was able to run 2k hps, 10k wall ac, 2 t5 fixtures (one 8 bulb one 6 bulb) with a few fans and I was in the 190-225 dollar range. This was like 2.5 3 years ago, I definitely was on top of paying the bill. Never had a problem with them in terms...