In this project we use Arduino mega, Ethernet shield, led bulbs and realy module. By implementing the W6100 as a webserver, you can control the led bulbs via the web. we are going to use one Arduino interfacing with 12 bulb using 3 relay module with low level trigger. We can trigger the relay from anywhere in the world using a website in which we’ll have GUI Button. In each trigger of relay the correspondence Bulb or group of bulb will glow. For more information, see the Source Link.