First Grow, Critical Purple Auto

I would leave all three turned on and move the light up or down as needed. I would leave the light on for 16-18 hours a day providing low to moderate light. There are free light meter apps you can download on your phone. They aren't calibrated or 100% accurate but they can get you pretty close and make getting the proper amount of light easy. I like the app PPFD meter. Then search online for "daily light integral chart" which will help you work the balance between how much light for how many hours a day. Also, looking at your diary that fan with hose in front of it isn't going to do much. Fan's are great at moving air in the open but can't generate the pressure needed to move air through a hose very well. Blowers intended for the job are much better at forcing air through restrictions like ducts and bends. When your plant matures and gets a strong smell you probably will want a charcoal filter to control the smell and will definetely need a exhaust blower to make it work. What are the photos of ingredients for? You have a great mix already with Fox Farm Ocean Forest so I'm curious what you are doing with all the other stuff. Did you mix your own soil? Are you using Ocean Forest? Did you add those other things to Ocean Forest?

My brother had one of his bruce banner photoperiod seedlings do close to the same thing. It ended up being fine, just started off a little slower than the other one he planted. it sure is trying to catch up, though! Just a slight deformation. Nothing to worry about. If you're new here, please select the answer that helped you out the most by clicking on the "answer" button underneath what the person said. If you have any questions, feel free to message me on here. You can pull up your messages tab by clicking on the little airplane in a bubble. It's located on the bottom-right of your screen. I hope this helps!