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The DFRduino Ethernet Shield V2.1 is now released. This version of Ethernet Shield is not only compatible with Mega 1280 and 2560, but also provides a Micro SD card slot for reading/writing.
DFRduino Ethernet Shield V2.1 is fully compatible with Ardunio Ethernet Shield. With the offical ethernet library, you can do exactly the same thing as the original one, but at a more affordable price.
This Ethernet Shield provides an Arduino controller board with internet access. It is based on the Wiznet W5100 ethernet chip.
how to use this tool and give examples of the use to turn on the lights?
It is same method using Arduino Ethernet Shield. It you want to know examples of the use to turn on the lights, see this link : http://wiznetmuseum.com/portfolio-items/how-to-the-lonely-christmas-tree-make/?portfolioID=11550