Abstract: A power supply is provided for illuminating an electro-luminescent lamp with a constant current and frequency drive signal having a predetermined limiting voltage level for compensating changes in the electro-luminescent lamp characteristics. The power supply operates from an AC or DC input voltage power source and includes an electronic ground fault current interrupter circuit means with remote reset capability to provide protection for the power supply and against user injury. An auto line AC voltage selection circuit senses and selects the proper voltage operating configuration without operator intervention. The status of an LED in conjunction with the status of the electro-luminescent lamp is used as an internal diagnostic aid to assist a user in isolating fault conditions. External signals from a lighting control panel are coupled via an input control circuit to the power supply to provide special lighting effects.