I'm not quite sure why you have your seedlings in the dark. Proffesionals mostly keep the lights on for 24/0 (24 hours a day). Cannabis does not require a dark period to rest. If you keep the lights on the 24/0 schedule you will have higher sucsess rates with females, faster growth and shorter internode lenghts. I'll tell you what I tell all other new growers. Go buy a cannabis growing book. They can be found at Barnes & Noble, Borders and Books A Million just to name a few. As for your room I don't know what to say because I don't know if your wanting to grow potent cannabis with high yields or just growing for the fuck of it. Your room needs major fucking work in order to produce high quality cannabis. No offense bro but I'm just being honest. If you want to know what equipment I use myself and need help with the design of your garden then let me know in this thread and I will be happy to assist you. Have a good day brother.