Abstract: An electrical lighting apparatus includes a track carrying electrical conductor strips and including a slot for receiving light fixtures. A flexible slot cover is provided to cover the open slot disposed between light fixtures. The cover includes a compressible resilient portion for easy manual insertion into and removal from said slot without the use of hand tools, and a relatively hard surface portion precluding slot insertion whereby with insertion of the compressible portion into the slot, the surface portion abutting overlays the edges of said slot. The slot cover is of such material that it can be sold in strips and easily cut to a desired length. The compressible portion may be fire retardant and provide electrical insulation, and the surface portion can be manufactured in any desired color, thus providing an esthetically pleasing appearance to the installed track lighting system.