This project aims to design a safe, attractive environment for Tajrish square in Tehran through urban lighting that enhances security. A descriptive method was used to analyze security categories and case studies. A questionnaire and field studies on Tajrish square were also conducted using CPTED (Crime Prevention Through Environmental Design) principles. The data was then analyzed in SPSS software to optimize routes, design lighting for predestination paths, and provide 24-hour lighting for the square.