Energy efficient smart street light

India is one of the developing countries facing difficulties with shortage of power resources, availability of energy due to ever increasing population. Over dependency on fossil fuel can cause problems that affect the next generation to survive. In the current context, it is very important to know how to minimize the energy consumption and how to adapt various energy efficient techniques at least for power limited systems to overcome the energy crisis. Many research works are carried out and people are looking for a clean and better solution for the next generations. The new era Internet of Things has given a new dimension leads to an energy efficient management system. Internet of Things can overcome the existing energy wastage problems to a great extent. IoT is a combination of electronic devices like sensors and intelligent software applications to build an effective data exchange network. In this paper, it is proposed that smart street light design which is one of the basic ideas in reducing wastage of power as in the concept of building a flexible smart city management plan which is essential to the prosperous life of the future generations residing in city environments. To implement this scheme a low-cost Wi-Fi module ESP8266, Light-dependent sensor and ultrasonic sensor are used. Here the LDR sensor is used ON-OFF the street light based on the ambient intensity level. This switching can be done by ESP8266 after reading the LDR value. The need of Ultrasonic sensor comes into picture when a vehicle or a person comes in the range, the light glows with 100%brightness otherwise, the street light glows with less intensity (60%). This avoids unnecessary power waste during the night when there is no sign of vehicle or pedestrian. Thus by using these two sensors, an intelligent automatic light is designed with the help of IoT frame work which is energy efficient.