An apparatus for manufacturing semi-finished products and molded articles of metallic materials includes an extruder for producing a flow of the metals, with appliances being connected thereafter for shaping the semi-finished products and the molded articles. The lamp is plugged into a socket mounted on a bracket that provides upward and downward adjustability. Calculations are made to derive electrical current values for each of the plurality of light sources which will illuminate a plurality of selected locations at the set illumination level. Examples include silicon carbide, low temperature silicon nitride or diamond-like carbon.