Abstract: A lighted sign, particularly useful for identifying a residence number on a street, has a display panel having a plurality of aligned numbers illuminated by LED's which are selectively programmable by the user to display the proper house number. In the event of an emergency, the sign is changeable to an emergency mode in which the numbers flash intermittently, and the LED's change from a first color to a red color indicating the emergency. The sign is activated manually or by means of a photocell, and the emergency condition may be actuated by a manual switch for a remote transmitter. The device may also be used to activate other emergency alert signals, such as an audible signal or a signal transmitter over phone lines.