Keep your light, I don't understand at all what the rest is trying to do except for some really weird hydroponic set-up that I don't think will work right and then I'm really confused about how the plants will be in the thing and the soil if its a hydro set-up, anyways. Find your closet, build a small box form(2' x 2' x 4') and wall it off with anything light proof. Then mount your light and get some pots and do a soil grow. Starting off hydro with no experience will definitely cost you more money than you want to.