artificial lighting during the night or when daylight is inadequate or not available to satisfy predetermined lighting needs the dimensions a and b are optimized to provide maximum performance the shaped reflector 30 has a compound shape that has been optimized by ray tracing to result in maximum illumination to be directed to the lower lens 16 in a unifoini pattern dimension b is optimized to deliver the maximum amount of light or illumination onto the lower lens 16 dimension a extending laterally or horizontally into the lower housing 20 is preferably made as small a possible to reduce any attenuation of daylight or natural lighting entering the window or dome 12 during the day however dimension a must be sufficiently large so as to uniformly deliver artificial light so as to provide a seamless transition from daylight or natural illumination to artificial illumination accordingly the combination of dimensions a and b deliver an almost or substantially uniform diffused light or illumination pattern on to the lower lens 16 that nearly matches the diffusion pattern of daylight or natural lighting the dimensions a and b are optimized as a function of the aperture c of the deep well skylight assembly 10 as illustrated in fig1 dimension a representing the distance the shaped reflector 30 extends laterally into the aperture c dimension a is approximately 11 of the aperture lateral dimension c in a preferred embodiment dimension a is approximately five inches and dimension c is approximately 45 88 inches therefore the reflector extends laterally.