The term Li-Fi is increasingly being used to refer to the use of Visible Light Communication (VLC) technology in wireless computer networking. (Note: This is different from "LiFi" projection TV technology introducted by Panasonic in 2007.) Li-Fi made news last year as researchers demonstrated VLC running at rates up to 800 Mbps. Research and development work on VLC continues, with no real products expected to arrive on the market anytime soon, yet the technology intrigues those looking for alternatives to Wi-Fi.
→ See also - The Proliferation of *Fi
A unique aspect of VLC is that connections only work when the device has a direct line of sight to the light transmitter. In some cases, especially when using mobile devices, this could become a major annoyance. Others, though, see it as a helpful security feature: Neighbors (or even people in the next room) will have a hard time sniffing your VLC connection.
→ More - 'Li-Fi' Provides a Light Bulb Moment for Wireless Web→ See also - The Proliferation of *Fi

This ABSOLUTELY could not be more confusing for me, I have tried and tried and tried to understand all things computer but wireless, networking, routers have forced me to give up. even trying to read thru your pages confuses me with all the underlines and side underlined text.