Li-Fi is a new wireless technology that transmits high-speed data using light rather than radio bands. Estonian startup company Velmenni took the technology out of the laboratories and into the real-world offices and industrial environments in Tallinn for the first time. The company was able to transmit data at 1GB per second, which is almost 100 times faster than the Wi-Fi speeds. The technology was originated in 2011 by German physicist Harald Haas who outlined the idea of using light bulbs as wireless routers.
Source: https://thehackernews.com/2015/11/li-fi-wireless-internet-technology.html