Over the last decade, the ultraviolet (UV) LED market has grown substantially. Much of this growth is due to the growing adoption of UVA LEDs in UV curing applications. The performance of UV LEDs, especially at UVA wavelengths, is improving, and LEDs are becoming more abundant and easier to source. The market is predicted to expand even more, as UVB and UVC LEDs improve in response to growing demand from emerging UV disinfection markets. This article presents in-depth information about the current state of UV LED technology and its market, as well as guidance on choosing the best LED products for each application.