Determination of light direction and efficiency criterias of plexiglass diffusion light source

In this research, main purpose is determination of light direction and efficiency criterias of plexiglass diffusion of light source. Within this scope, linear slots were opened in plexiglass and these slots' distances were shifted in order to analyze luminous flux, light intensity distribution and their effects on fixture's efficiency. This study and evaluations were examined in accredited laboratory with goniophotometer. As a result of the measurements, it was observed that slots in the plexiglass and distance changes in between these affect the lighting values of light source. By using these effects and the distance between the slots, a mathematical model was created with the least-square method. In this study, it was concluded that the luminous efficiency of the lighting fixture is not only related to the light source, but also the light source that used in the fixture is directed towards the area to be illuminated properly