A lamp assembly, comprising: one or more light emitting diode arrays, wherein each one of the one or more LED arrays comprises a plurality of LEDs and defines a spatial radiation pattern having a first central axis; a controller circuit to output a current to the one or more LED arrays; a lens array to redirect light received from the one or more LED arrays, wherein the lens array comprises, for each one of the one or more LED arrays, a total internal reflection lens defining a second central axis aligned with the first central axis of the corresponding LED array, wherein the TIR lens comprises multiple and concentrically arranged annular facets having tips progressively closer to a plane normal to the second central axis, the facets of the TIR lens to distribute light received from the corresponding LED array from an output face of the TIR lens, wherein the angularity of the facets is such that the distributed light defining optical paths that are convergent, divergent or collimated with respect to the second central axis, and wherein the LED array is located behind an input face of the TIR lens; a base comprising a first surface to receive the one or more LED arrays, the controller circuit and the lens array, and a second surface structured to be removably received by a lamp holder; and a light-transmissive cover attached to the base and disposed over the first surface thereof such that the one or more LED arrays, the controller circuit and the lens array are contained between the cover and the base, wherein the one or more LED arrays and the controller circuit are mounted on a front surface of a printed circuit board substrate. one or more light emitting diode arrays, wherein each one of the one or more LED arrays comprises a plurality of LEDs and defines a spatial radiation pattern having a first central axis; a controller circuit to output a current to the one or more LED arrays; a lens array to redirect light received from the one or more LED arrays, wherein the lens array comprises, for each one of the one or more LED arrays, a total internal reflection lens defining a second central axis aligned with the first central axis of the corresponding LED array, wherein the TIR lens comprises multiple and concentrically arranged annular facets having tips progressively closer to a plane normal to the second central axis, the facets of the TIR lens to distribute light received from the corresponding LED array from an output face of the TIR lens, wherein the angularity of the facets is such that the distributed light defining optical paths that are convergent, divergent or collimated with respect to the second central axis, and wherein the LED array is located behind an input face of the TIR lens; a base comprising a first surface to receive the one or more LED arrays, the controller circuit and the lens array, and a second surface structured to be removably received by a lamp holder; and a light-transmissive cover attached to the base and disposed over the first surface thereof such that the one or more LED arrays, the controller circuit and the lens array are contained between the cover and the base, wherein the one or more LED arrays and the controller circuit are mounted on a front surface of a printed circuit board substrate.