LiFi can transmit up to 100 Gbps and possibly higher, but this will require a change in lighting technology.
With Li-Fi, your light blub is essentially your router. It uses common household LED light bulbs to enable data transfer, claiming speeds of up to 224 gigabits per second.
The term Li-Fi was coined by Professor Harold Haas of the University of Edinburgh during a TED talk in 2011. Haas envisioned light bulbs that could act as wireless routers.
Recent news suggests that LiFi is 100 times faster than WiFi. The assumption was that the average wifi speed is 10 Mbps, and that LiFi can be as fast as 1 Gbps. It is important to highlight that the 1 Gbps transmission speed from an off-the-shelf commercial LED light bulb has not yet been demonstrated. In this discussion, it is important to make such comparisons. The facts are:
The visible light spectrum is 1,000 times larger than the radio's 300 GHz, micro wave, and mm wave radio spectrum, so there is a large untapped reserve of resources for wireless systems.
The experienced data rate in a network where multiple users must share bandwidth is much lower than the maximum headline data rate in a WiFi system.
The current and future growth of wireless data traffic will mean that the radio frequency spectrum will not provide sufficient resources until 2025.
The fastest WiFi in the 60 GHz frequency band, WiGig, can achieve a maximum data rate of 7 Gbps
Phosphor coated white LEDs that are mostly used in all commercial lighting devices can deliver up to about 100 Mbps
How does Li-Fi Work?
Li-Fi and Wi-Fi are quite similar, as both are electrically transmitted. However, Wi-Fi uses radio waves, while Li-Fi works on visible light waves.
Li-Fi, as we now know, is a Visible Light Communications (VLC) system. This means that it adjusts a photo-detector to receive light signals and obtains a signal processing element to convert data into 'streamable' material.
An LED light bulb is a semiconductor light source which means that the continuous flow of electricity supplied to an LED light bulb can be submerged and dimmed at high speeds, without being visible to the human eye.
Rapidly increasing small changes of LED bulbs are converted into electrical signals by the 'receiver'.
The signal is then transformed into a binary data stream, which we recognize as web, video, and audio applications running on Internet-enabled devices.