Abstract: An illumination system employs a light distribution cylinder with an exterior surface in the form of a plurality of progressively smaller-diameter cylindrical steps. The outside surface of each cylindrical step is interrupted by V-shaped grooves perpendicular to the axis of the cylinder. Each surface of these V-shaped grooves acts to internally reflect divergent light from a light source positioned at the end of the tube. The light distribution cylinders may be solid or hollow and configured with bilateral symmetry to receive light from either end. The illumination system rearranges divergent directional light from a light source into non-directional light emitted in a cylindrical pattern useful for area illumination.

Abstract: A lighting module employs a Fresnel lens having concentric regions of different focal lengths. The light source is positioned at the focal distance of a central lens region and inside the focal distance of a peripheral lens region. The resulting light pattern is a bright central spot surrounded by a ring of diminishing brightness.