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LIFI Technology (Light Fidelity)


Introduction: Li-Fi Technology

LIFI is a wireless optical networking technology that uses light-emitting diodes that is LED for data transmission. LIFI is designed to use LED light bulbs similar to those currently in use in many energy-conscious homes and offices. However, LIFI bulbs are outfitted with a chip that modulates the light imperceptibly for optical data transmission. LIFI data is transmitted by the LED bulbs and is received by photoreceptors. So LIFI early development modules are capable of 150 Megabits per second. Some commercial enabling speed has been released in the lab with stronger LED and different technology. Researchers have enabled 10 Gigabits per second which is faster than the latest WIFI technology. 

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Li-Fi Technology

How It Works?

Let’s understand how LIFI works. You might have heard about WIFI which is another technology that is used in order to transmit the data. LIFI and WIFI are quite similar as both transmit data electromagnetically. However, WIFI uses radio waves while LIFI runs on the visible light spectrum. As we know now LIFI is a visible light communication system, which means it does accommodates a photodetector to receive light signal and a signal processing element to convert the data into streamable content. An LED light bulb is a semiconductor light source meaning that the constant current of electricity supply to an LED light bulb can be dipped and dimmed up and down at extremely high speed without even being visible to the human eye. For example, data is fed in an LED light bulb with signal processing technology it then sends data embedded in beams with rapid speed to the photodetector which is a photodiode. 

The timely changes of the rapid dimming of light bulbs is then converted by the receiver into electric signals. The signal is then converted back into a binary data stream that we would recognize by Video and Audio application. That turns on internet-enabled devices. So this is how basically LIFI technology works.


Both LIFI and WIFI technologies are mainly used for internet-based applications. LIFI uses light as a medium for data communication whereas WIFI uses electromagnetic waves for data communication. LIFI is an optical communication technology whereas WIFI is a radio communication technology

LIFI signals cannot pass through the walls so in order to enjoy full connectivity capable LED bubs needs to be placed throughout the home. LIFI requires a light bulb is on all times to provide connectivity meaning that the lights need to be on during the day. Additionally, where there is a lack of light bulbs there is also a lack of internet. So LIFI does take a hit when it comes to public LIFI networks. However, using LIFI instead of WIFI you will get a lot of security problems associated with shared and often overloaded broadband networks. It will also be advantageous in areas where the radio frequency range does not reach. Due to impressive speeds, LIFI could make a huge impact on the internet of things too. With data transfer at much higher levels with even more devices able to connect to one another.

This portion of the site is for informational purposes only. The content is not legal advice. The statements and opinions are the expression of author, not corpseed, and have not been evaluated by corpseed for accuracy, completeness, or changes in the law.


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Sagar Sharma
I have over 8 years of experience working in product regulatory compliance. Currently, I work as the operations head at Corpseed Ites Pvt Ltd, where my Job role is providing best in class consulting in the field of product compliance.