In search of an energetic substantial saving in buildings but without depreciating the suitable development of visual activities that need specific levels of lighting, is necessary not only bear in mind the quantity, but also of the quality of the light flow that affects in the places of work. Depending on the disposition of the different architectural elements of the buildings, as well as of the materials that compose them. The distribution and efficiency of the natural light and/or artificial it behaves of different way and therefore, it influences the sensations and environments in which they develop the activities above mentioned. The parameters that determine the quantity and quality of the lighting they are obtained by means of physical models in simulated environments, the results here obtained serve to distinguish his utilization in spaces from occupational different use, from that need a certain percentage of minimal daylight factor, up to those that they need of great visual detail in specific tasks.