Looking good! I have the same light (Sunshine Systems 90w UFO) plus 4 26w daylight CFL in a 30"x34" space. I added the CFLs because it looks like a little too large an area for the UFO to cover. 5 weeks veg, will flip them in a couple of days when they're recovered from getting topped. It's my first grow and good to see someone else having success with the light.
Did you do any pruning or training on that plant? Looks nice and bushy.