Open source hardware is hardware whose design is made publicly available so that anyone can study, modify, distribute, make, and sell the design or hardware based on that design. The hardware's source, the design from which it is made, is available in the preferred format for making modifications to it. Million SoUL Program of IIT Bombay is instrumental to develop such Hardware, which is required for the manufacturing of Solar Urja Lamp and other Solar products so that localization of Solar technology can be promoted.