I just purchased a 3'X3'X6' greenhouse for indoors. It is made of what appears to be simple plastic sheating. I set it up in a tall window that faces south and gets sun most of the day. It is winter so thats about 8-10 hours a day. I'm planning on growing parsley, spinich, lettuce, radishes, and kale. I've been reading everything online about greenhouses but none of it is specific to something as small as mine! I was hoping someone out there had the same setup as me or could at least lend some basic advice. Particularly on air circulation, grow lights, heat sinks, will this thing work in general? Thanks a million!