I would suggest putting your light in the top of the cabinet. The way it looks only half the plant will be getting lit up. Mount it horizontally up there. You may have to go and pick up a different socket for your bulb. Man its gonna be tight in there..LOL

First thing..whats with the power supply? Why is it still in the case?

About the light..i just looked at the pic again, I would take out the power supply and get an L shaped bulb socket that will allow you to mount your bulb horizontally and I would get myself the 105W cfl that puts out like 350w. Its only about 3 inches wide