Gorilla Cookies

First time growing! I set up a ghetto 3.5x3.5 diamond Mylar grow area in my basement with a 315W CMH as my light. I have another seedling that just sprouted as well that will be in a separate diary. I started out using the wet paper towel method in a plastic baggy that I placed over my modem in order to germinate my seed and it was ready to be placed in my 5 gallon fabric pot containing Promix HP after 24 hours. The seedling showed herself after another 24 hours and we have liftoff! I am excited. The issues I'm running into is I live in a very cold but recently legal state and this room is in my basement so the nighttime temperatures are getting a little low for my liking. I recently purchased a small ceramic space heater that I hope will remedy the cold night time temps. The RH is also quite low between 25-35% so I'm hoping to get a humidifier soon as well.