This work investigates project parameters such as geometry, window size, quantity of artificial light and distribution of artificial light. The ECOTECT software is the analytical tool, which permits space adequacy studies and optimization of the energy used on artificial lighting systems. The obtained illumination qualities are results of varying the sizes of the void, environmental widths and lengths. To start with, the NBR 5413 demands for worksatations, circulation and lighting levels were accessed. This study assigns the best evaluations on geometry, lighting and energy relationships.