a system for the insulated support of neon lights comprising a cylindrical glass cup having different diameter , longitudinal intersecting bores for receiving and securing together the respective ends of a cylindrical neon tube electrode and the cylindrical end of glass encased high voltage wire . a resilient o - ring encircles and holds together the respective end of the electrode and glass sleeve and the combination is slidably moved into the cylindrical insulating cup , with the o - ring being compressed between the inner surface of the cup and the outer surfaces of the electrode and glass sleeve , securing the combination within the cup .