Abstract: An electroluminescent apparatus utilizes a replaceable electroluminescent sheet which, in operation of the apparatus, is held between two electrodes that are within a resealable housing which may be opened and closed so that a used electroluminescent sheet may be removed therefrom and replaced at the end of its usable lifetime. The housing has front and rear panels associated with the respective electrodes, at least one of the panels being transparent. The electroluminescent sheet is held between the electrodes when the housing is closed and may be removed therefrom and replaced when the housing is opened. A compression structure is provided in the housing to assure close physical contact between the electrodes and the electroluminescent sheet when the apparatus is in operation.