Power conservation is no longer just a fashionable expression. It has now become a necessity. Static method of conservation like usage of electrical devices with lower power consumption or scheduled power cuts are not very efficient. This paper proposes a dynamic automated power conservation system which uses wireless sensor networks(WSN). The advantage of using WSN is that this system can be easily installed in already existing buildings where as a wired system will be expensive and difficult to install in the same scenario. The use of wireless sensor network greatly reduces the size and cost of the system and is suitable for a lighting system. In the proposed system, there is an array of light sensor nodes which can communicate with a master node(MN), providing information about the light conditions at each sensor node. Based on the feedback information the MN decides which all light sources to control. Once this is decided the MN transmits the data frame to a particular light control node to control the light, which is electrically connected to it.
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