I put it in a 5 gallon pot because everything I read said don’t transplant an auto. Good idea with spray bottle that way I know plant isn’t over watered but I’m not drenching the big pot till it gets bigger.I wouldn't worry about the light as much as the size of the pot, I wouldn't water it at all, just a couple of spritzes with a spray bottle every few days or one in the morning. I usually use a seedling tray or starter cube, It will take a while for that pot to dry out. I'd actually pull it and transplant into a much smaller container if it was mine but good luck and careful with over-watering.
It’s a 600 watt hid x 2 plus there’s 2 T5 in the back ground with the other autos. Got the Lights at 50% on the ballastHold off on watering. Move light further up or use something softer. That looks like a lot of watts for that small of a plant.