Li-Fi is 100 times faster than Wi-Fi. LED lights could be used for delivering data
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With scientists achieving speeds of 224 gigabits per second in the lab using Li-Fi earlier this year, the potential for this technology is huge. And now, scientists have taken Li-Fi out of the lab for the first time, trialling it in offices and industrial environments in Tallinn, Estonia, reporting that they can achieve data transmission at 1 GB per second - that's 100 times faster than current average Wi-Fi speeds.
The technology uses Visible Light Communication (VLC), a medium that uses visible light between 400 and 800 terahertz (THz). It works basically like an incredibly advanced form of Morse code - just like switching a torch on and off according to a certain pattern can relay a secret message, flicking an LED on and off at extreme speeds can be used to write and transmit things in binary code. The flickering of light is too fast for humans to notice.
http://www.bbc.com/news/technology-34942685