Hey Jcenter I used the same exact light setup that you have with almost the same dimensions - pretty sure my cab is smaller than yours.

Check out my first two grows in my signature I yield almost 2oz in that space and probably could have done better. The Bubblelicious and the Bubblelicious/Blueberry grows. After that I added HPS for my last 2 grows.

You will need to LST your plants heavily, especially the AK47 as it will be stretchy most likely . I had to do a crazy amount of LSTing on my plants even the indica dominant ones.

Good luck!