there is provided embedded light guiding parts that allow for light , signals or live images to appear on its surface . specifically there is provided a light system having an array of rods made in a hard transparent or translucent polymer material embedded in a building material . the tapered rods are held together by a back - bone that connects the bases of the tapered rods to achieve an evenly distributed array of tapered rods , preferably having the same orientation , wherein the rods are adapted to receive a light input at the base ends and to transmit the light output at the front ends of the rods .