We know that Li-Fi is the short form of Light Fidelity and Wi-Fi is the short form of Wireless Fidelity. LiFi uses light for data transmission while WiFi uses electromagnetic waves at radio frequencies for data transmission. Due to less interference incurred by light compare to radiofrequency waves, it is used in more dense environments..

LiFi covers a distance of about 10 meters while WiFi covers about 30 meters. Both provide almost the same data transfer rate. Let us understand Li-Fi internet and Wi-Fi internet network architectures.

Figure-1: Li-Fi internet

 The figure-1 depicts Li-Fi internet network architecture. As shown in the figure there are two major components in Li-Fi internet viz. LED Lamp and Li-Fi Dongle.

• As shown lamp driver is connected to the internet on one end and with LED lamps on the other end. Streaming content from the internet is pushed to the LED lamps through Lamp driver software.

• LED lamps are placed at different locations as per requirement in the office or home premises for multiple users.

• Li-Fi dongle is used in order to use Li-Fi internet services by various users. As shown Person#1 is browsing the internet on Laptop, Person#2 on a tablet, and Person#3 on the smartphone.

• As shown LiFi dongle is composed of the photodetector, amplification & processing, and applications for different types of data.

• All the LED lamps can be switched on and off using a power button switch provided.

• Li-Fi internet provides a very fast data rate at 1 Gbps speed.

Figure-2: Wi-Fi internet

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• The figure-2 depicts Wi-Fi internet network architecture.

• As shown in the figure there are two major components in WiFi internet viz. WiFi router and WiFi dongle or WiFi Stations.

• WiFi router is connected with ADSL modem or Cable modem. This modem is connected to a network of internet service providers.

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• WiFi router works on multiple bands (e.g. 2.4 or 4.9 or 5 GHz) as per requirement. It converts internet data packets into wifi-compliant signals at the above bands. WiFi works on IEEE 802.11 standards.

• These EM waves are received by WiFi dongles or Stations connected with IP compliant devices. Hence WiFi internet is used by various clients as shown in the figure-2.

In the following table, we will list the basic difference between LiFi and WiFi technologies.

Feature Comparison: LiFi vs. WiFi

LiFi is not the replacement of wifi technology. It can be considered an incredible companion of wifi technology. It operates between 380 nm to 780 nm optical range. LiFi is used to exchange data incredibly rapidly and securely at a much lower power level compared to WiFi.

Products Based on Li-Fi Technology | Li-Fi products

There are various li-fi products such as lamps, Kits, LiFi smartphone,s etc. The vendors and OEMs of LiFi products are also mentioned.

LiFi Kit

OLEDCOMM is a world leader in LiFi products which includes LiFi routers, LiFi hubs, LED drivers, LED lamps, and a complete kit for the lighting systems. There are several LiFi kits developed by OLEDCOMM. The kit contains the following :
• LED Lamps
• Tablet with Android
• Dongle to use with LiFi Smartphone
• Software library
• location-based application for LED Lamps.

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Panasonic LiFi Lamp

Panasonic has a range of LiFi LED Lamps.

Popular LiFi products with Vendors

Following are the popular LiFi products and their leading vendors.

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