Abstract: A highly efficient luminaire. The luminaire includes a light source that emits light. The emitted light is redirected by a light transformer having a curved circular reflective interior surface, the reflective interior surface reflecting the light in a predetermined pattern. A substantial amount of light being may be reflected close to an axis coincident with a radial line defining a radius of the circular reflective interior surface. Additionally, a substantial amount of light may be reflected in a pattern with low divergency or parallel with an axis of the light transformer. The light is transmitted to the exterior of the luminaire by an optical window.

Abstract: A waveguide includes a longitudinal structure having a first end opposite a second end. The waveguide further includes a grooved surface formed on the structure adjacent the first end. The geometric size of the longitudinal structure is substantially constant while the grooved surface reshapes a light input ray to decrease the divergence of the ray in the vertical direction and increase the divergence of the ray in the horizontal direction.