What is Li-Fi Technology? Benefits you Need to Know | Li-Fi Vs Wi-Fi | How does LiFi work when you turn off the lights? | Why Li-Fi is More Reliable

What is  Li-Fi Technology? Benefits you Need to Know | Li-Fi Vs Wi-Fi | Why Li-Fi is More Reliable?

What is  Li-Fi Technology? Benefits you Need to Know | Li-Fi Vs Wi-Fi

What happens if you want to download a movie in just seconds while standing under a LED Bulb? And also restricted to show that connection with friends when you are in a room with that Technology and your friend in another room. This technology gives you much more speed as you think.

What is Li-Fi Technology?

Li-Fi stands for Light Fidelity is a light communication-based system that is capable of transmitting data at high speeds over the visible light, ultraviolet, and infrared spectrums. At present, only LED lamps can be used for the transmission of visible light. LiFi is a wireless technology holds the key to solving challenges faced by 5G.

LiFi can transmit at multiple gigabits, is more reliable, virtually interference-free and uniquely more secure than radio technology. Such as Wi-Fi or cellular. LiFi is a mobile wireless technology that uses light rather than radio frequencies to transmit data. The technology is supported by a global ecosystem of companies driving the adoption of LiFi. The next generation of wireless that is ready for seamless integration into the 5G core.

By using LiFi in all the lights in and around a building, the technology could enable a greater area of coverage than a single WiFi router.

Li-Fi technology transmits data at very high speed and is capable of delivering data at 224GB/s. Nowadays Free Wi-Fi is using in a railway station, Hospitals, and others. As result, Hackers stupefy the people by hacking and to get personal information of users. In those cases, Li-Fi is much better than Wi-Fi. The term was first introduced by Harald Haas during a 2011 TED Global talk in Edinburgh.

Li-Fi Vs Wi-Fi

1. Li-Fi stands for Light Fidelity while Wi-Fi for Widelity Fidelity. Li-Fi is a Visible Light Communications (VLC) system which runs wireless communications that travel at very high speeds as compared to Wi-Fi.
2. Li-Fi uses light for data transmission while Wi-Fi uses electromagnetic waves at radio frequencies for data transmission
3. The coverage area of Li-Fi is limited i.e. 10 m while of Wi-Fi is approx 30m.
4. Li-Fi signals cannot pass through walls so you could enjoy a single connection/prevent a huge connection. But LED bulbs will need to be placed throughout the home whereas  Wi-Fi has not required the light bulb to provide connectivity.
5. There is a lack of light bulbs, there is a lack of Li-Fi internet
6. In the Wi-Fi connection, there are facing a lot of security problem but Li-Fi secures during connection.

Why Li-Fi is More Reliable?

Radiofrequency communication requires radio circuits, antennas and complex receivers. On the Other side, LiFi is much simpler and uses direct modulation methods similar to those used in low-cost infrared communications devices such as remote control units. LED light bulbs have high intensities and therefore can achieve very large data rates.


LiFi can deliver multiple Gbps speeds on mobile devices.  This next-generation technology will drive wireless beyond any current capability for opening up unprecedented bandwidth.
LiFi is fully networked, and each LiFi enabled light has it a unique IP address. It means advanced geofencing(Use of GPS or RFID technology to create a virtual geographic boundary) can be deployed simply in a LiFi network.


LiFi can operate in daylight and even in direct sunlight conditions, as the modulated light can still be detected. LiFi relies on detecting the fast changes in light intensity. Thats why not on the absolute or slowly varying levels caused by natural disruptions in daylight or sunlight. LiFi technology modulates the light at very high rates and the sunlight is constant light and therefore can be filtered out at the receiver.

How does LiFi work when you turn off the lights?

If all power to light is turned off then there is no LiFi. However, LiFi technology can be enabled to dim low enough that a room will appear dark and still transmit data. There is consistent performance between 10 and 90 percent illumination.

Currently, pureLiFi’s technology provides communications at light levels down to 60 lux. For comparison, the British standard for minimum light level for reading is 400 lux.


There are also other options for using invisible parts of the light spectrum such as infra-red, which is currently already being used for sending information back to the lightbulb (uplink).

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