Abstract: A luminaire lens assembly having a top lens including an external reflecting area and a bottom lens with an external refracting area and an internal refracting area, wherein the internal refracting area has at least three concentric prismatic areas, a first concentric prismatic area having a first defined number of prisms, a second concentric prismatic area disposed directly adjacent the first concentric area having a second defined number of prisms at least 1.5 times as great as the first defined number of prisms, and a third concentric prismatic area disposed directly adjacent the second concentric area having a third defined number of prisms at least 1.5 times as great as the second defined number of prisms whereby the first concentric prismatic area further defines a radius, the second concentric prismatic area defines a second radius at least 1.5 times as great as the first concentric prismatic radius, and the third concentric prismatic area defines a third radius at least 1.