The inventor of light-based ‘Li-Fi’ Internet has completed the first working prototype

Back in 2011, during a TED Talk in Scotland, professor Harald Haas introduced a revolutionary idea to the world: what if a wireless Internet system could run on nothing but an LED lightbulb? Back then, this “Li-Fi” concept was just a cool idea, but now, roughly four years later, professor Haas is back with a working prototype. If this invention catches on, all you’ll need is a lightbulb and a solar cell to get online in the not-so-distant future.