In order to compare a hybrid lighting system with automatic control to a traditional lighting system withmanual control, a subjective assessment study was carried out in two rooms at the TechnicalUniversity of Istanbul. In the test room, a light shelf system equipped with automatic control wasinstalled and in the reference room, a manually controlled traditional lighting system was installed. Therooms were occupied by 20 subjects for specific periods of time, at the end of which, paper-basedquestionnaires were introduced.