1. A lamp, comprising:a base having an electrical connector;
a central body disposed on the base;
a driver circuit disposed in the central body and coupled to the electrical connector; and
a light assembly joined to the central body, wherein the light assembly includes a waveguide comprising a first surface and a second surface that terminate in an outer surface to define a waveguide body, the waveguide body surrounding an interior coupling cavity disposed such that the waveguide body extends radially from the interior coupling cavity, at least one LED disposed in the interior coupling cavity and connected to the driver circuit such that the at least one LED emits light into the waveguide body when activated by the driver circuit, the light propagating radially outwardly through the waveguide body between the first surface and the second surface to the outer surface, and a plurality of extraction features disposed in and spaced across the second surface of the waveguide body, the plurality of extraction features reflecting the light to the first surface, the light being emitted from the waveguide through the first surface; wherein light emitted at radially outward portions of the first surface are directed axially inwardly at an inward angle, the inward angle being substantially proportional to a radial distance of emission of the light from the center of the waveguide.