Do yourself a favor and buy a roll of Mylar or Panda film.
Build some portable "walls", or hang a pvc tube frame from the ceiling and hang some of that Mylar (or what ever reflective material you bought) from that.
You want to have the light reflected back at the plant.
Say big enough to be 1-2 ft from the plants edges.
You will concentrate the light energy back at the plant and get even better results....Get that light right down to about 18-24 inch's away from the canopy too.
Let us know how that strain runs for you.