The Internet of things (IoT) describes the network of physical objects "things" that are embedded with sensors, software, and other technologies for the purpose of connecting and exchanging data with other devices and systems over the Internet.The IoT concerns a wide range of modules like the data acquisition, communication, sensors etc. Owing to the lack of consideration of cyber security threats, they have an inherent technical debt which results in compromised medical devices with unpredictable behaviour. With the increasing market share of the IoT devices in the healthcare field, it has offered a simple door for cyber criminals trying to misuse and profit from device vulnerabilities. In this paper we discussing about attack on smart bulb. We are providing cyber security on smart blub with different module such as attacking on smart bulb then detect the that particular attack last prevent the attack.