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I have a 7 ft tent with quantum boards and I had a couple of colas of the Sativa leaners that hit the lights. The Indicas are not as tall but my 5 foot tent would not have worked for those. If you run out of height just collapse the Colas by breaking the fibers of the stalk by carefully rubbing between fingers. The cola will still grow but sideways instead (support with strings) or just let it hit at the end. It will burn back an inch or so but the rest will be fat and sticky from all that stress. Some of my best colas have been burned back
I did scrogg a couple of plants and that did keep those short. You do lose the long Colas of those Sativas of course.
When to flip? I kind of go by when the flowers get some hairs and really look like they are ready. I do not use calendars; I go by looks (very superficial when real girls are involved so refrain from it when dating; in fact, ages are kind of important when dating, not just how old she looks ;-)
I have flipped when a plant had less than a dozen full-size leaves and I filled a half-gallon jar with it; these really get to work and grow after they get flipped.
In fact I'm going with late bloom nutes today because they look like they are ready (got some fan leaf dying and the flowers "look" at that point) not because the growing chart says today is the day.
Distance? I do not use a ruler but maybe 12-18"? (a little more, a little less) at flower using homemade Quantum board lights. (3000k) On the last grow I had the light tilted quite a bit (6+ inches) because of the height difference between the Sativa leaners and the Indica leaders.
My current grow has a Sativa leaner from a different seed broker that is the same height as these guys' Indica; that is interesting given the height difference I have been working with lately. It also is definitely finishing quicker but one seed is not a good indicator of average flowering time.
I'd go with the manufacturer of your light. They know their focal points best. Most just go with that and then adjust as the plant prefers from there.
Ok I'll try to do and report.
Thanks for very detailed explanation.
