Were you or are you running your light at 100%? The recommended light settings that came with my light suggests 60% at 22” to 26” for seedlings, once in veg up to 100% at 18” to 22”, in flower, 100% at 14” to 18”. Each light brand will have their own recommended settings. I’m growing in a 2.3’ x 2.3’ x 5’ tent. First time I’ve seen a plant that short that is already flowering. No clue as to what would cause that. I had one stubby, about 9” full grown. Zkittles by FastBuds. My guess was that my humidity level was too low (less than 20%) and I wasn’t PHing my water. I currently have a Six Shooter outdoors that is a shorty. High temps and very low humidity at about 10%.