LiFi (Light Fidelity), also known as visible light wireless communication, also known as optical fidelity technology, is a technology for transmit data using light from a bulb. A small chip implanted in a light bulb can produce wireless Internet connectivity similar to Wi-Fi hotspot devices. LiFi is designed to challenge existing Wi-Fi technology, but currently has limitations. LiFi was initially designed and then patented by Herald Haas and his team at the University of Edinburgh in 2011. Haas noticed that LED retrofit bulbs flicker very quickly. The bulbs flash at a rate of a million times per second. Such flashes are not visible and only a sensitive receiver can detect them. With an electronic chip attached to the bulb, these flashes can be used to send data. In this way, the LED bulb can quickly transfer binary coding. This code can be understood by a Wi-Fi router. This is similar to a flashlight sending Morse code, but much faster and using a computer to understand the alphabet. Using standard LED lights, Haas and his colleagues created an Internet connection....