Abstract: The "IOT BASED SMART STREET LIGHT SYSTEM" project is an Internet of Things application. The system's primary goal is to use Arduino to develop a smart street light controller system. The primary goal of the system, which is designed to save energy, is to prevent energy waste caused by street lights that turn on automatically at dusk and off at dawn. It makes use of an Arduino Uno board along with an IR and LDR sensor. Arduino is an open-source platform for prototyping built on user-friendly hardware and software. To write code and upload it to your board, Arduino offers an intuitive and open-source programming tool. It's often known as the Arduino IDE. The LDR sensor, which regulates the brightness that the infrared sensor is exposed to, is unquestionably the primary controller in use. The vehicle or any obstructions in the path are detected using an infrared sensor. The system will turn on a led when it detects a car or obstruction. A portion of the lights in our system are ON, while others are OFF. Lights turn on when there is an obstruction or when cars approach. The light will turn off after the car or obstruction has moved.

| DOI: 10.17148/IARJSET.2024.11580