I picked up a 4x8 sheet of 1/4" plywood and had it cut to size at Lowes and attached it to the frame with paneling nails.
next I measured for the risers to mount the endcaps for the bulbs, then i remeasured 10 more times and test fit before drilling pilot holes for mounting screws.
then I checked the fit and checked it again just to make sure.
I mounted the remaining lamps the same way and switched it on to test it out. (note:do not look directly at the lamps when you plug them in, i was seeing spots for 30 mins after)
Damn thats bright!
I finished up the top and mounted it to the hinges
Then i placed it on top of the tank and switched it on
perfect, now I have to mount the ballast, clean up the wiring , add the handle to the top ,add molding around the corners and stain it to match the stand.