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LI-FI (Light Fidelity): Future of Data Transmission

August 8, 2018
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There was a time when we used to transmit data through Bluetooth or such sort of communication in which data transmission rate was negotiable. But with the time, the wireless technology has grown eventually and compatible technologies with faster data rates were introduced such as NFC, Wi-Fi, Wi-Fi Direct etc. With these technologies now the data transformation was easier than ever. But now there is a new technology introduced in the market which will overtake the Wi-Fi Technology which is the leading and most popular data transmission technology, which is Li-Fi  Technology. So what is Li-Fi and how it works and all the regarding questions are answered in this article.

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LI-FI Technology


Li-Fi Technology:

Basically, Li-Fi is a wireless data transmission technology that uses light rays as the source of data transmission. In 2011, in the ted talks, Harald Hass has introduced us to the emerging and futuristic data transmission technology called LIFI. The full form of LIFI is Light Fidelity which sounds similar to WIFI (Wireless Fidelity) and LIFI works on the VLC(Visible Light Communication). The data transmission rates of LiFi are effectively faster than all other wireless technologies including WIFI, NFC and so on. The study says that WIFI affects our health as well. Many websites and articles have described the harmful effect of WIFI on our health. Wireless routers – as well as Bluetooth and similar wireless systems – give off electromagnetic radiation in the low-gigahertz frequency. This level is considered potentially dangerous to people [1].  The transmission of data is operating by the light rays in the LIFI technology instead of choosing the electromagnetic radiation. , thus it’s safe to use the LIFI.



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How LI-FI Works?

How LI-FI works

Credits: KimKomando

In this light-based data transmission technology, the light rays transfer the data rather than the electromagnetic radiation. The idea of LIFI says that, for this technology we don’t need to apply any extraordinary infrastructure instead the infrastructure is built all around us in form of lamps, street lights, in ceilings, in cars, bikes and all the places that have a single LED bulbs. Harald Hass has explained in his presentation that these chips can be set into any LED bulbs, so that it can be used for transmission of data. And we are all familiar with the presence  of LED bulbs around us.


How Is It Better?

Wifi vs LI-FI

Credits: DIFFERENCEbtw

Today the fastest medium of data transmission is WIFI so we will compare this technology with the latest and fastest available technology WIFI. So how LIFI is better than WIFI? There are certain criteria, on behalf of which we will decide that how it is better than the available technologies.

  • Availability and setup:

Since the LIFI technology is based on data transmission through lights and thus the infrastructure of LED bulb is already very strong. Thus it can be available from a street lamp to a light implemented in a flight. On one hand, where WIFI needs several sorts of a router and complex setup, the LIFI set up needs nothing but tiny LED bulb.

  • Privacy:

While using WIFI the privacy is a primary issue because anyone with great skills and bad intentions can access your data through your WIFI if he is in the range of your WIFI. But in the case of LIFI, privacy is a huge advantage, because the light cannot pass through the wall and that’s why no other person can access to your data or your network unless he is visible to you.

  • Speed:

In the sense of speed, WIFI was the primary choice of everyone till yet, but not anymore because with this technology the transmission rate of data with the data transmission rate of maximum 52 Mbps, but with the LIFI technology the data transmission rate has jumped to the speed of up to 1 GBPS, which is rapidly fast than the WIFI.

  • Totally Harmless:

As the WIFI constantly affects our health but at the same time LIFI is harmless to health, which is a pretty big advantage because the light does not impact on our body.


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Applications of LIFI:

There is a certain use of LIFI due to its availability and privacy.LIFI is applicable on the various parts, where these other technologies are not capable to reach. Fields such as underwater, for instance we can provide an internet connection to the tiny submarines with LIFI. There are many uses and applications of LIFI and some of them are :

  • Today the demand of internet has took a huge rise and then LIFI is hope to that ray. This concept will be possible by providing these chips in the street lights, so anyone who is under the light can use the internet.
  • This technology is applicable at the places where other technologies are not capable to reach, such as underwater. With LIFI, underwater data transmission is possible.
  • LIFI is also beneficial for automotive cars to sense the other car and avoid the accidents.
  • The automotive vehicles can also communicate with devices such as Smartphone.
  • Remotely manage other lights.


LIFI in future:

LI-FI in future

Credits: DarkWebNews

The list of all features and applications has created on the basis of Harald’s 2011’s presentation. After 4 years later, in 2015 Harald surprised us once again with the concept of appending the solar panel. The concept of using a solar panel as input  source of Light rays. In result, the solar panel was harvesting energy and streaming the data at the same time. That describes the supply of both energy and data transformation into one. Well, that’s just the small step toward the infinite possibilities of this futuristic data transmission technology.



[1] “EMF Health Effects,” safespace, [Online]. Available: [Accessed 08 August 2018].




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