LiFi the healthier alternative to WiFi

LiFi the healthier alternative to WiFi

Here is a summary of an interesting new technology that could replace WiFi.
LiFi (light fidelity) is a bidirectional wireless alternative to WiFi that uses visible light to transmit data. Using LED light bulbs to access the Internet, LiFi has several advantages over WiFi including speed, energy efficiency, safety and security.

Data transmission speeds of up to 224 gigabits per second have been achieved in research labs, that’s equivalent to a download of 18 movies in one second. With the addition of a small microchip, energy efficient LED lights can become data access points, providing both light and wireless Internet transmission. Unlike WiFi, LiFi does not transmit radio frequencies but instead uses the visible light spectrum, which is considered by many to be harmless to humans and nature.

The light spectrum is also 10,000 times broader than the radio spectrum, providing greater bandwidth than WiFi. Light cannot travel through walls and ceilings thereby LiFi provides a more secure environment which can’t be hacked remotely.

(c) PureLiFi - How VLC works

(c) PureLiFi – How VLC works

Imagine a home or business environment in the future containing LiFi enabled LED lights and laptops/iPads equipped with photodiodes built into their screens. Users will have fast Internet access in a safe and secure environment. It’s doubtful that mobile phone towers could ever be replaced by this technology as it couldn’t reach into buildings and homes, but by shielding the building walls, ceiling and windows with Geovital shielding products EMF exposure would be minimal whilst still enjoying wireless internet connectivity inside with LiFi.

LiFi is being seen as a disruptive technology with many companies and research institutions becoming involved in visible light communication (VLC) including the inventor of LiFi Professor Harald Haas who stated “In the future we will not only have 14 billion light bulbs, we may have 14 billion Li-Fi’s deployed worldwide for a cleaner, greener and even a brighter future.”

No guarantees just yet that LiFi is not a health burden

There are people that investigate the quality of man-made light versus the quality of natural light. Light remains, in the end, of course also energy. There is a possibility that light with much data hidden within it, may still have negative health effects, but as we have so much health issues linked to electromagnetic radiation from sources like WiFi it is ok to be hopeful that LiFi offers a better alternative and a much brighter future.
We’ll look toward the future and see what LiFi might bring us.

Below are links for further information:
TED Video – Harald Haas – Wireless data from every light bulb
Yaabot – Good overview of LiFi and how it works
JBtimes – LiFi Breakthrough: 224 Gbps – LiFi Real world usage


2016-10-14T23:53:13+02:00 By |Tags: , , , , , , |

About the Author:

Tim Sawyer is an academic who lectures at university level about ionising radiation. Health and radiation has always been of much interest and educating others about safe practices and radiation-free living is indeed a passion.


  1. Zenoans 11/04/2019 at 6:54 pm - Reply

    i think is great idea. I think it could solve the problem from Wireless WIFI 4G. Since terrahertz cannot penetrate once body like the others !!! Please share with us any studies on Lifi.

  2. Shoaib Raza 08/06/2017 at 3:59 am - Reply

    keep posting these kind of articles it inspires to every internet newbie like me.
    continue your good work.

  3. Wzaert 26/06/2016 at 7:47 pm - Reply

    I think that if it is in the house it could be controlled. If you use a mini lamp and shine just where the receiver is and then block the light that comes out of it to the surroundings it could protect the eyes.Weza

  4. Robin H 16/03/2016 at 8:01 am - Reply

    I am ElectroHyperSensitive and can tell that flickering light is everything but healty. I know a lot of ther EHS people and they all have problems with current LED’s that work on AC mains voltage. The electronics cause the LED’s to not produce continuous light but rather flicker at high frequencies (tens of kHz) or mains frequency (100 or 120 Hz). Even though a human’s eye cannot directly observe the frequency, the brain can. I for example have problems with DLP beamers too. I don’t see the red, geen and blue images alternating but I do see flashes of colours when I move my eyes and get eyestrain after just a few minutes of watching.

    It is not the carrier frequencies that are the problem but the data in it. Whether you modulate data at 400 MHz, 800 MHz, 1800 MHz; 2,4 GHz, 5 GHz, 60 GHz or 200 THz it does not matter. If the modulation and bandwidth is the same they will cause similar effects in EHS people. Though high frequencies are shielded much easier which is conveniënt for EHS people.

    But it is the bandwidth, pulsrates and Multiple Access Division causing sharp changes in the power output that cause problems. DVB signals tend to cause less problems because they are continous though the high bandwidth of tens of MHz in combination with the high power (kiloWatts) does not make it safe and a lot of people with EHS still have problems.

    Ofcourse this is THE inconveniënt truth of the 21st century. The majority does not want to limit or even give up their wireless freedom until they are affected by the health effects themselves. Just like the majority did not want to stop smoking in the 70’s.

    I guess people do not learn from other their mistakes but rahter make the same mistakes themselves. So we just have to wait for the cancer clusters to come. That’s why history repeats itselve. People can change, but most just don’t want to do what it takes.

    • Patrick van der Burght 16/03/2016 at 11:02 pm - Reply

      Dear Robin, thank you for your comments. I do also wonder how this will change or not change things. I know light quality is also an important factor, so we’ll have to see what happens when these systems are indeed in place. At least they can’t get out of the building they are in and influence areas around them like WiFi can.
      When in the future you personally encounter this technology, please report back on here your findings.
      Much appreciated.

    • Jonathan R Garcia 25/02/2018 at 9:08 am - Reply

      Hello Robin,

      I appreciate your comments. Curious, do you think your eyes would be affected if a DC light bulb was used? Also do you know if we can run Lifi through any other type of light bulb tech such as incandescent? I know energy energy efficiency would taea hit but just curious.
      Best Jonathan

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