if you care little for yield 12/12 straight away. but unless you have a low ryder plant, you are going to run out of space unless you LST your plant.
you wont even have the full 14" as you need to light over the plant too. Lightbulb + space not to burn. you'll have about 10 inches. then you have your pot. another 2 or 3? your plant will have a max height of 7".....
Realisticly I don't know if that is enough space. I have heard about people growing thier plants horizontally though? I guess that is a type of LST though.
If you don't have a low ryder I would seriously suggest making a bigger space before your plant fills the space.
Good Luck,