The ADA Tejas (Radiance) is India's attempt to domestically develop a 4th generation multi-role fighter using as much local technology as possible. Despite being the smallest and lightest aircraft of its class in the world, the Tejas is a quite capable fighter and is constructed with a number of advanced features such as extensive use of composites in the airframe, fly-by-wire controls, and glass cockpit with multi-function displays and helmet mounted sights. While most technologies are of indigenous design (including the multi-mode radar and the digital fly-by-wire software), a fair amount of foreign assistance has been used during various phases of development although overall the Tejas remains a stunning achievement of what the Indian aeronautics industry is capable of. Expected to be operational by 2005, a number of delays has resulted in the Tejas not being ready at least until 2008.

Initially known as the LCA (Light Combat Airaft), the first technology demonstrator TD-1 was rolled out in late 1995 but did not fly until 4 January 2001 due to structural concerns and issues with the flight control system. A number of PV prototypes have been constructed as well as some NP aircraft optimized for carrier operations, these will likely replace the Sea Harrier in Indian Navy service. A two-seat conversion trainer will also likely be built.