Besides the many lights that have never been produced how about color variations one I can think of right away absecon had 4 different day mark color variations point bolivar Tx had 2 variations.I would go for some of the different colors Chatham has several building and tower variations I think a historical series would be great.OK now I've put in my 2cents maybe some one else can come up with some ideas.Bill O'Brien oseabee