Impossible to tell. Plant looks very lanky. I'd either wrap the walls in mylar or paint with flat white, and close in the open sides to help maximize the little light you have.
1/2 oz or so would be my guess. If she is still in veg you need more light. She will stretch out and then the nodes will be too far apart. Scant CFLs won't fill her out.
I highly recommend topping and lst for cfl. keep her short with lots of even tops.