From my early flower experiences,if flowered at around 12 inches.. You will get a nice bid one stalked bud unless you topped early. The plant will go through a slight stretch. I am assumming you are using an HID light 600 or better. Not saying 400 won't do well! I've just used 600's and 1000 watters,when flowering at a height of 12 inches. They use that method as a sea of green standard height.

Ga.