In today’s society, the absence of street lights would pose significant risks to individuals on roadways, highlighting their crucial role in urban safety. However, traditional street lighting systems are plagued by high power consumption, which is a substantial barrier to developing sustainable smart cities. This project addresses this issue by creating an intelligent, energy-efficient street lighting system that leverages renewable energy sources. Our proposed solution utilizes photovoltaic panels to convert abundant solar energy into electrical power, then stored in a 12v battery. This stored energy powers 10-W LED lights, providing efficient and bright illumination. A key innovation in our system is the dynamic adjustment of LED brightness based on real-time object detection. Specifically, the LEDs operate at 12 V when an object is detected, ensuring maximum visibility and safety. When no object is detected, the system reduces the LED operating voltage to 8 V, significantly conserving energy while maintaining adequate illumination. By integrating PIR sensors and adaptive control algorithms, our smart street lighting system optimizes energy usage and enhances the lifespan of the lighting components. This approach reduces overall power consumption and contributes to creating smart, sustainable urban environments. The system’s practical implementation and real-world performance evaluation demonstrate its potential as a viable solution for modernizing street lighting infrastructure in cities worldwide.