Done 16 per 4x4, a lot more work than I want to do. Really need to thin them to have light penetrate bottoms. Now I’m 9 per 4x4 and only do a clean up/lollipop n thin once and hit same numbers when I was crowding. I also get veg 5-7 days longer cause I top longer which I don’t mind. I hate having to pluck leaves 3 times in a run lol