An apparatus adapted for use in a street light installation for illuminating a surface with an illumination pattern, comprising: an LED light source; and a lens having a base adjacent the LED light source, the lens further comprising light directing surfaces (51, 52, 53, 57, 58, 59, 70), said light directing surfaces including, in an order from the base and arranged in an elevational direction, a first surface, a second surface, and a third surface extending over a first range of azimuthal angles defining a street side of the apparatus, wherein the second surface is a blended contour between the third surface and the first surface, and wherein the third surface is configured to provide a light spreading effect, the light directing surfaces further including, in an order from the base and arranged in an elevational direction, a fourth surface and a prismatic element (51, 70) defined as part of the lens surface, extending over the remaining second range of azimuthal angles defining a curb side of the apparatus, wherein the first, second and third surfaces adjoin the fourth surface in an azimuthal direction, wherein the fourth surface is divided into two subsurfaces by an intersection and is indented or depressed at the intersection such that the subsurfaces spread the light outward from the intersection in larger angles, so that when the intersection is perpendicularly oriented to the curb in a street light installation, the subsurfaces spread the beam through the first surface in directions more parallel to the curb and away from the intersection, wherein the first surface has an undercut portion which extends partially around the base and which smoothly transitions into fourth surface, wherein the first surface and the fourth surface are arranged to direct energy from a peripheral beam of the LED light source, wherein the lens shapes the light emitted by the LED light source into an azimuthally asymmetric light distribution, and wherein the prismatic element comprises a total internal reflection surface arranged to reflect beam energy from the LED light source from the curb side to the street side such that more light is directed to the street side of the apparatus than to the curb side of the apparatus. an LED light source; and a lens having a base adjacent the LED light source, the lens further comprising light directing surfaces (51, 52, 53, 57, 58, 59, 70), said light directing surfaces including, in an order from the base and arranged in an elevational direction, a first surface, a second surface, and a third surface extending over a first range of azimuthal angles defining a street side of the apparatus, wherein the second surface is a blended contour between the third surface and the first surface, and wherein the third surface is configured to provide a light spreading effect, the light directing surfaces further including, in an order from the base and arranged in an elevational direction, a fourth surface and a prismatic element (51, 70) defined as part of the lens surface, extending over the remaining second range of azimuthal angles defining a curb side of the apparatus, wherein the first, second and third surfaces adjoin the fourth surface in an azimuthal direction, wherein the fourth surface is divided into two subsurfaces by an intersection and is indented or depressed at the intersection such that the subsurfaces spread the light outward from the intersection in larger angles, so that when the intersection is perpendicularly oriented to the curb in a street light installation, the subsurfaces spread the beam through the first surface in directions more parallel to the curb and away from the intersection, wherein the first surface has an undercut portion which extends partially around the base and which smoothly transitions into fourth surface, wherein the first surface and the fourth surface are arranged to direct energy from a peripheral beam of the LED light source, wherein the lens shapes the light emitted by the LED light source into an azimuthally asymmetric light distribution, and wherein the prismatic element comprises a total internal reflection surface arranged to reflect beam energy from the LED light source from the curb side to the street side such that more light is directed to the street side of the apparatus than to the curb side of the apparatus.