Thought you had 6" cool tubes?The purgro 1K4 ballast is going to be my next investment . it has 4 1000 watt ballasts & flip feature & timer all built into one ballast . i will grab another one to have in case the first one needs working on , but they are feild repairable , meaning each 1000 watt ballast is repairable by replacing the circuit board for that ballast .
i'll just have to upgrade my fans & filtersto 8" & put in 1000 watt bulbs instead of the 600's ..... & when i do get a bigger space , i can set up another room just like it on a flip .