A lamp reflector comprises a pre-formed member molded from a polymer into a smooth and continuously curved shape. The members have a rigidity characteristic sufficient for maintaining its shape. A reflecting layer is bonded directly to the molded member to provide a reflector surface without facets or sharp angles. The shape of the member is comprised of a rear portion being an involute spline and side portions being defined by conic sections. The method of providing such a reflector decreases the amount of light reflected back into the lamp and trapped or absorbed within the lighting fixture. The method further eliminates the need for adhesive layers between the metal reflecting layer and the substrate which generally decreases the optical efficiency of the luminaire.
