I struggles with 5 feet height when i started,
Once you have lost the height of the pot, mines are 12 inches, leaves you 24 inches, lose 6 inches for the light at its highest leaves you 18 inches. You need space between your plants and lights, an 150hps your gonna need 12 inches of space 250w of cfl in 1 or 2 bulbs you can get away with 6 inches of space maybe, if multiple clf's hanging all over maybe less. Your gonna have to cut down on pot size to give ye a little more height, doing that usually stunts the height but sometimes it stops the side branching completely but still gives you a 2 foot tall cola. Other times it will still grow full size, some people do well in shallow pots.