form in cross section with a defined or specified intensity profile across that cross section the primary optic 815 is disposed at an entrance opening to a mock parabolic housing 820 in fig8 in the illustrated embodiment the mock parabolic housing 820 includes an interior having a reflective surface that receives and reflects light emitted from the primary optic 815 in an exemplary embodiment the cavity of the mock parabolic housing 820 has a geometric form at least part of which resembles or follows a parabola or a conic section in certain embodiments the mock parabolic is opaque and prevents light from transmitting between two adjacent illumination modules in certain embodiments the exit aperture of the mock parabolic truncates eliminates clips or otherwise manipulates part of the beam of light produced by the primary optic 815 in the exemplary embodiment illustrated in fig8 a plate of optical material 825 covers the exit aperture of the mock parabolic in one embodiment the plate of optical material comprises a secondary optic such as a fresnel lens in another exemplary embodiment the plate of optical material comprises a diffuser in yet another exemplary embodiment the plate of optical material comprises a fresnel lens facing the primary optic 815 and diffusion features etched or otherwise formed on an outer surface of the.