she'll let you know. I had mine in a box powered by 4 LED floods and 1 full spectrum cfl. She grew to a bushy 2' and stayed there. When I took the LEDs for another project, she started to droop. I had to add 2 more cfls to replace what the LEDs were giving her.
Just stay in the cooler side of the spectrum(blue) and keep her on 20/4....
good luck!