4x Northern Lights #5 x Haze

The smallest one is now 6cm in height and the tallest one is 11. The smallest one seems like it's a week behind the others, it's also tiny in width compared to others. This week I added Co2 supplement by making a yeast-sugar-water-brew in a 30l container. It's placed inside the tent. I'm starting to have problems again with heat, and I'm trying to explore options to tackle that. The lamps are now operating under half of their capacity, approximately 400 watts of power is now consumed by them in total. I tried to amp them up but the temp rocketed to 32C at worst when I closed the room door to maximize the Co2 levels. By estimation, I will have to keep them in vegetative mode for at least another two weeks. I'm also starting to plan what kind of training I will apply to them. I'm thinking to FIM them first in about five days, then start to LST them around the grow pot, and later SCROG 'em. What I've learned from the past, I'm gonna set the scrog really low compared to before. I really don't need long legged plants and especially I don't want to take the recommendations too lightly on how long the distance should be from plants to lamps.