Lobby signs are typically made of letters and/or grapics mounted directly to a wall or to a panel and then attached to a wall. Lobby signs can be mounted flush to the wall or on spacers. Spacers put distance between the sign and the wall creating depth and casting a slight shadow. Installation is generally faster and more cost efficient when mounting a panel to the wall rather than individual letters. For further information read the complete article at the 360 Signs blog.