Im running two dual 600w lumiteks with the supper lummins switch and two dual 250w gallaxys in four large ajusta-wings as a dual spectrum system, one 250w MH & one 600w HPS end to end in each large ajusta-wing, for a total of 3,400w's in a 12' by 8' room. Been using this setup for about a year now with no problems, other than one of the gallaxys being bad right Out of the box, one side would fire intermintly. kind of a pain in the ass is all i had to take it back three times, every time i got to the hydro store it would work fine, go figure huh! Other than that i love this system they run cool they're quiet and IMHO mutch brighter.