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Pure LiFi transmits data using light

Pure LiFi's system sends data wirelessly using light rather than radio waves, with a 'Li-Flame' prototype that knows which light source it's supposed to be receiving data from.

BARCELONA, Spain — Transmitting wireless data using radio waves is so old fashioned — in the video above, you'll see the technology that sends data via light, and could stream Internet video to your TV from a light in your ceiling.

The system works by attaching an Ethernet-wired ceiling-based device to a standard LED light. The data about to be beamed through the air is sent to that bulb, which is instructed to flicker millions of times per second to communicate a signal — kind of like an extremely speedy morse code.

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