I'm currently setting up a 4' 120 with 2-250wt MH. The only difference for my lighting will be the 4x48" 110wt VHO. If for some reason I don't like the colour I can play around with the vho's. i.e. 2 atinics and 2 50/50 etc. I'm not sure if adding a 400 wt is neccessary like Buck-A-Neer said. Adding another 250wt would keep your light spectrum and overall look even throughout the tank. 250wt HQI's might be the way to go as apparently they are somewhat more intense than the SE bulbs if you wanted to upgrade and boost your lighting . Or you could add vho lighting to what you already have wich may fill in the gap nicely as well. HTH
Cheers
