Light Fidelity(Li-Fi) and Wi-Fi are quite similar as both transmit data electromagnetically. However, Wi-Fi uses radio waves while Li-Fi runs on visible light.
Light Fidelity or Li-Fi is a Visible Light Communications (VLC) system running wireless communications travelling at very high speeds. Li-Fi uses common household LED (light emitting diodes) light bulbs to enable data transfer, boasting speeds of up to 224 gigabits per second.
Visible light spectrum spans 300 terahertz, from red light at 400 terahertz to violet at 700 terahertz. Thus, light has 1,000 times more frequency available for wireless communications than radio.
The first Lifi Dongle for laptop use has a range of about 10 meters (33 feet), It came out in 2016 but still has more development to go.