strain advice for computer tower grow??help

Hi i am looking into doing a stealth comp. Tower grow..I did one awhile back but just used brown seeds..I am going to be making a new tower and any advice on lighting and growing methods greatly appreciated..i think the max height is gonna be 21 inches if that so im wondering what strain would be best in that small of space..but I want potent and good producer to

hello i like auto seeds auto 1

short rider nirvanna seeds will fit but takes effort.

I was gonna chime in and say some kind of Auto too...as far as lighting, LED's? Small space, win.

I used to have a strain Trinity x Shark's breath that I loved, loved for small indoor spaces.

Another choice could be a nice shrubby Kush. They generally like to be squat. Bubba K is old school bush.