!8 watts is a bit weak....at least double it...six inces is too far ..2 inches is best...the lack of intense light is causing them to focus their energy on stem growth and not leaf....i doubt the window will give sufficient light at this time of year! lower your fluoro..and make a little reflector..from white paint or even paper or best mylar..if your too poor to afford a new light..use a suplementary reading lamp...