LiFi is being tested now and stands to be at least 100 times faster than WiFi. The way it works is it uses LED lighting to transmit. Don't worry, you won't be having seizures due to flashing lights. It transmits in micro bursts that cannot be detected by our eyes.
Harold Haas from the University of Edinburgh in Scotland demonstrated that he can transmit far more data this way. The technology uses Visible Light Communication and works like a very advanced Morse code. Basically, you could download 1.5 GB of data every second.
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