I have lights that are ready to go onto my 120 gal once I get the canopy finished and sell off some livestock. What I was going to use was a 175w MH 20k on the left side, 175w MH 14k on the right side, and a 150w MH 14k in the center (the reason that there's 2 different color rated bulbs is that I have them laying around from previous applications and don't want them to go to waste). I was also going to put 3 x 4 foot VHO's over it (2 daylight/ 1 actinic). It'll give me 500w of MH lighting and 830w of total lighting w/ the VHO's taken into account. I don't know if that'll be enough light though.