The wireless communication technology has been evolved from 1G to 5G networks. The next 6G era will bring about higher demands for bandwidth and speed. Visible light communication (VLC) shows great potential in providing high speed and secure communication links by utilizing the unregulated visible light spectrum to carry the data. In this seminar, the overview of VLC will be presented first. The devices and components developed for the VLC network will then be reviewed and discussed in detail. I will also briefly talk about the application of underwater communication application by using visible light at the end of the seminar.