After struggling through a day with your mobile data, you find yourself ecstatic reaching home. Wi-Fi right? Well, that’s about to change. What’s wrong with Wi-iF? Isn’t it fast? Absolutely Yes, but who wants “Fast” when you’ve found “Faster”.

What is Li-Fi?

Li-Fi or Light fidelity uses visible light communication(VLC) to send data at extremely high speeds. Essentially this is more like a flashlight turning off and on at very high speeds in order to relay information through binary code (1s and 0s). This technology is able to transmit up to 224 Gigabits per second as compared to 600 megabits per second by Wi-Fi. That is extremely fast.

Imagine, transferring data from your light bulb to your phone 100 times faster than Wi-Fi.




Estonian start-up Velmenni has begun trialling Li-Fi in offices and other industrial settings in Tallinn and it has signalled Li-Fi’s entry to real life situations.

Apart from being substantially faster than Wi-fi,

  • Li-Fi is much secure than Wi-fi, in terms of privacy protection.
  • Li-Fi could provide the answer to increasing frequency congestion.
  • Li-Fi can scale up due to the existing capacity of lights.
  • Dirt-Cheap !


The inventor, Harold Haas of the University of Edinburgh believes that the existing light sources of 14 billion could replace Wi-fi and mobile networks that run on RF rays. He is basically using light bulbs as routers. Wow!


Here’s Harold Haas at a TED talk where he demonstrates his proud invention for the first time.