Li-Fi is a wireless communication technology that transmits data using visible light, ultraviolet, or infrared light from LEDs (Light Emitting Diodes). It was first introduced by Professor Harald Haas during a TED Talk in 2011, where he demonstrated how a flickering LED light could be used to stream high-definition video. https://www.marketresearchfuture.com/reports/visible-light-communication-li-fi-market-3561