Global Free Space Optics (FSO) and Visible Light Communication (VLC) Light-Fidelity (Li-Fi) Market By FSO Component (Transmitter, Receiver, Modulator & Demodulator), By FSO Application (Defense, Satellite, Healthcare, Security), By Transmission Type, By VLC Components (LEDs, Photodetectors, Microcontrollers, Software), By VLC Application(Defense & Security, Vehicle & Transportation, Aviation, Healthcare), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2021-2031