Abstract: Reducing energy demand in the residential and industrial sectors is an important challenge worldwide. In particular, lights account for a great portion of total energy consumption, and unfortunately a huge amount of this energy is wasted. Light emitting diode (LED) lights are being used to light offices, houses and building facilities more efficiently than traditional lights. Moreover, the light control systems are introduced to current markets, because the installed lighting systems are out dated and energy inefficient. However, due to high costs, installation issues, and difficulty of maintenance; existing light control systems are not successfully applied to home, office, and industrial buildings. In this system low cost, wireless, easy to install, adaptable, and smart LED lighting system to automatically adjust the light intensity to save energy and maintaining user satisfaction and also we control the light on the bases of Timing Control Android Application. The system combines motion sensors and light sensors in a low-power wireless solutions using wireless communication. Characterization of a commercial LED panel was performed to evaluate the benefit of dimming for this light technology. Measurements of total power consumption over a continuous six months period (winter to summer) of a busy office were acquired to verify the performance and the power savings across several weather conditions scenarios. This system reduces total power consumption. Saving energy has become one of the most important issues these days. The most waste of energy is caused by the inefficient use of the consumer electronics. Particularly, a light accounts for a great part of the total energy consumption. Various light control systems are introduced in current markets, because the installed lighting systems are outdated and energy-inefficient. However, due to architectural limitations, the existing light control systems cannot be successfully applied to home and office buildings. Therefore, this system, an intelligent household LED lighting system considering energy efficiency and user satisfaction is useful. This system utilizes multi sensors and wireless communication technology in order to control an LED light according to the userís state and the surroundings. This LED lighting system can autonomously adjust the minimum light intensity value to enhance both energy efficiency and user satisfaction. This LED lighting system reduces total power consumption to a great extent. However, since the existing lighting control systems can support only simple on/off or dimming control according to user movement or brightness of surroundings, it is hard to be applied to complex environments such as house or office. The complex environment means that there is a variety of control requirements, because of the presence of a variety of users. Because of this limitation of existing systems, they are mostly installed in the places such as the front door or the hallway. Furthermore, since the existing systems without considering user satisfaction, it is not appropriate to the places such as house and office where user satisfaction is more crucial factor than cost benefits due to energy saving; thus a new intelligent lighting control system should consider both energy efficiency and user satisfaction. In addition in this system we are adding power consumption for computers moreover we also control fans and saving lots of energy. Finally we monitor all the consumption of energy through Web Page. To implement this system we will require different electronic components like PIR,R-Pi 3,LDR,DHT11,Relay circuits, RTC etc.

Keywords: LED (Light Emitting Diode), PIR (Pyroelectric Infrared Sensor), DHT11 (Digital Humidity & Temperature Sensor), RTC (Real Time Clock), LDR (Light Dependent Resistor).