A modular back panel assembly for a display structure comprises at least one back panel defining front face apertures. The back panel rear face is comprises at least one elongated channel aligned with the front face apertures. An elongated electrical conductor is mountable within the elongated channel and defines conductor apertures for being coaligned with the front face apertures. A display member is mountable to the back panel front face of the back panel and comprises an electrical conductor with a mounting element that is insertable within the coaligned front face and conductor apertures. An electrical assembly provides electrical power to the elongated electrical conductor. Insertion of the mounting element within the coaligned front face and conductor apertures provides for mounting the display member to the front face and for electrical communication with the electrical conductor thus allowing the elongate electrical conductor when electrically powered by the electrical assembly to provide electrical power to the display member electrical conductor.