While traveling to LA I found this and thought it would be perfect for those people who like to add electrical doo-dad's to the layout.

This is in front of the Los Angeles Bureau of Street Lighting, they have an example of many of the street lights they use in different parts of town.  Each light has a little plaque indicating in what part of the city it was used.  For the person who likes street lights on their layout, this would allow one of of everything.