Selected Issues on Material Properties of Objects in Computer Simulations of Floodlighting

This paper addresses issues with computer simulation involved in designing illumination for architectural structures. In particular, the reflectance and transmittance of materials were studied respect to their influence on luminance values, thus directly power levels luminaires applied under particular projects. Raster images derived from digitally processed daytime pictures used precisely define material properties. Bitmaps tested regard measuring editing a widely graphic application. A real object, Basilica Dormition Jerusalem, served as test object. floodlighting design was performed following complete analysis all electrical photometric parameters. Luminance distributions analysed comprehensively. Hence, data allowed an assessment lighting compliance guidance given by International Commission Illumination (CIE) objects its required standards. The utilization factor solution developed also verified, it is input parameter evaluating not only energy efficiency installed system, but impact has surroundings, this case, project that be implemented.