Is it better to grow autoflower or photoperiodic plant in small grow tents?

There are short, medium, and tall autoflowers, just as there are photoperiods. It would really come down to what you want to try, however with photoperiods you will have control over plant size based on when you flip it to flower. But no matter what you decide to grow, you will mostly likely see a lot of stretch only using a cfl bulb. I'd try a short strain, and lst it so the canopy is as flat as possible to best utilize what little light there will be. Happy growing.