This paper describes the design and construction of an automated goniophotometer. It consists of an optical-photometric system mounted on a positioning system, and its purpose is defined as luminaire characterization. The proposed model is based on the use of two mirrors in order to reduce the total size of the system. This original configuration is possible due to a motion control system which improves the general performances of the goniphotometer. The prototype has been tested and the results show higher accuracy and lower time to characterize a luminaire than other commercial solutions.