Northern Lights Autoflower

Happy to be growing again after a long break. First time growing autos so I'm hoping for the best. Counting day 1 from seedling emergence. Trying out a new light, Photon Fantom Designs QB board 4000k, and noticed some stretch early. Lights started at 36 in so I lowered to 28 then to 24. 2 of the plants folded over due to weak stems so I am now down to 18 in going into week 2. The 2 plants in the back also appear to be a bit smaller. I am hoping with a boosted feed and lowered light these girls will recover quickly.