LiFi uses LED bulbs to transmit data using visible light, while WiFi uses radio waves transmitted via routers. LiFi has no interference issues, transfers data faster up to 1 Gbps, and provides more secure transfers since light is blocked by walls. However, WiFi has a longer coverage distance of about 32 meters while LiFi only reaches around 10 meters. Both technologies find applications in internet access, with LiFi suitable for dense environments like airplanes and hospitals due to its lack of interference.

1. LiFi Vs WiFi
Light Fidelity Vs Wireless Fidelity
Aditya Parmar
Electrical Engineer
Charotar University Of Science & Technology
adisoni624@gmail.com

2. Working Operation
• LiFi transmits data using light with the help of LED bulbs.
• WiFi transmits data using radio waves with the help of WiFi router.

3. Components Of the System
• Lifi Uses Lamp driver, LED bulb and photo detector
• Wifi Uses Wifi router and subscribing stations.

4. Causes Of Interference
• Lifi System do not have any intereference issues similar to that of radio
frequency waves.
• Wifi will have intereference issues from nearby access points routers.

5. Technology Used
• In Lifi IrDA compliant devices are used.
• In Wifi WLAN 802.11a/b/g/n/ac/ad standard compliant devices are used.

6. Privacy
• In LiFi, light is blocked by the walls and hence will provide more secure data
transfer
• In WiFi, RF signal can not be blocked by the walls and hence need to employ
techniques to achieve secure data transfer.

7. Data transfer speed
• Lifi can have data transfer speed up to 1 Gbps.
• Where, In Wifi WLAN-11n offers 150Mbps of data transfer speed.

8. Frequency of operation
• Life Uses 10 thousand times frequency spectrum of the radio.
• Wifi has 2.4GHz, 4.9GHz and 5GHz of frequency of operation.

9. Coverage distance
• The coverage of about 10 meters can be covered in Lifi system.
• Whereas in wifi system about 32 meters can be covered(WLAN
802.11b/11g) and it also vary based on transmit power and antenna type.

10. Density Of Data
• Lifi can work in high dense environment.
• Wifi works in less dense environment due to interference related issues.

11. Applications
• Lifi used in airlines, undersea explorations, operation theaters in the
hospitals, office and home premises for data transfer and internet browsing.
• Used for internet browsing with the help of wifi kiosks or wifi hotspots.

12. Thank you