2x2x4 First time grow

First time grow in my storage room that isn't insulated. Concerns are temperature and humidity. I added insulation to the roller door and grow tent. Reflectix on the door has added around 10°f. Reflectix around the tent has helped hold the temperature steady at 75°f. Also added a envi heater that only pulls 450 watts that hangs on the wall behind the tent. Today the outside temp low was 30°f So my winter temp concerns have been handled. Humidity though is too low between 35 and 42%. Buying an inkbird humidifier that arrives Monday. The Grow Put seed in water for 16 hours Then seed in paper towel inside ziplock bag and put on top of my router for warmth. 1 inch Taproot formed after about 31 hours and then planted in 5 gallon fabric pot and used plastic cake top as humidity dome. Light at 26 inches and dimmer at 50% Starting at 24 hours light because I want keep tent warm during these freezing temps. Hope to go to 20-4 on Monday. Merry Christmas