I used to be pretty big time with 2x 1000w hps for my 12/12 room, and one 600w MH in my veg room, and a 8 & 4 bank T5's, co2, the works...
Now im in a 2ftx2ft tent that is just under 5ft tall :D, using LEDs and some CFL if needed. Im sick of the energy bills, and heat issues, ESPECIALLY heat...