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 lightbulbs to enable data transfer, boasting speeds of up to 224 gigabits per second. 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.
As we now know, Li-Fi is a Visible Light Communications (VLC) system. This means that it accommodates a photodetector to receive light signals and a signal processing element to convert the data into ‘stream-able’ content. An LED lightbulb is a semi-conductor light source meaning that the constant current of electricity supplied to an LED lightbulb can be dipped and dimmed, up and down at extremely high speeds, without being visible to the human eye.
Li-Fi has made a huge impact on the internet of things too, with data transferred at much higher levels with even more devices able to connect to one another. Moreover due to its shorter range, Li-Fi is more secure than Wi-Fi and it’s reported that embedded light beams reflected off a surface could still achieve 70 megabits per second. CRT LED lighting applications and SEMS Management Control system are compatible with Li-Fi that’s the solution it is proposing to make Smart cities.