Thats my bad bro. It read like you didnt know 18/6. Had me mystified and shit. I grow to space. So in my vertical grow i have 6.5 feet of vertical height and 3.5ish horizontal height. Now if im growing some stretchy ass sativa Ill 2 top 3 times and let her get about 2.5 feet tall. After stretch she should be right around 6 ft. I may do some super-cropping to bring some smaller branches up to snuff.
Now Indicas i grow to half my vertical height. 3 ft. they;ll stretch to 6 and get nice and wide as well.
I also run all this in 25 gallon organic no till pots.