My space is a 4x4x6. I can only let my plant get about 2 ft tall before flipping and counting the 5 gallon bucket that's 18 inches added to the plant height so 3 1/2 feet from the ground they go in to 12/12. They still have to stay 1 foot to 1 1/2 feet away from the light so that's 4 1/2 feet...