How much light were you giving the plants @ 18 inches away? Did you ever use a PAR meter? Or is therea dimmer? I see you never moved the light - did you raise it as it got biggeR? What to what %?
@HiGHLYDiGESTiBLE, I have 2 spider farmer sf2000s. I started with it dimmed to just under 50% in veg. After the stretch it was on 100% around 16 inches from the canopy. I dont have a PAR meter but I found the reading off the official website and went off that.