Critical Purple first grow

First week of flowering stage: I risked 48 hours w/out H20 as I went home for XMas. H20 less a problem than the 3” of growth, post first feeding, of big bud from Fox Farm. One Cola was burned by the LED. I snipped off Just below the entire burn area. I also planted 3 plants in an 18x36x40 tent. Too many. I am doing ScrOG thankfully. This way, at the very least, I can try and target what looks promising. Hindsight would have me plant two in the space. Maybe just one. I’m concerned the stalks look long and spindly. Maybe it’s just the way it will be for a little while?