Now-a-days many people are using internet to accomplish their task through wired or wireless network. As no. of users get increased in wireless network speed decreases proportionally. Though Wi-Fi gives us speed up to 150 Mbps as per IEEE 802.11n, it is still insufficient to accommodate no. of desired users. To remedy this limitation of Wi-Fi, we are introducing concept of Li-Fi. As per Germen physicist Harald Haas “data through illumination†– taking the fibber out of fiber optic by sending data through an LED light bulb that varies in intensity faster than the human eye can follow. Haas says his invention, which he calls D-LIGHT, can produce data rates faster than 10 Mbps, which is speedier than your average broadband connection. The LASER Li-Fi is the advanced version of Li-Fi where we use LASER at the place of LED. The on-off activity of LASER is fast in comparison of LED. Data transfer speed of LASER Li-Fi is upto 10Gbps while LED Li-Fi data transfer speed is only 1Gbps. LASER is used for better performance and high data transfer speed.