The correct answer is: Energy-efficient lights.
The UJALA scheme (Unnat Jyoti by Affordable LEDs for All) is a government initiative that aims to promote the adoption of energy-efficient LED lights in India. The scheme offers subsidies to consumers who switch to LED lights, and has been successful in reducing the country’s energy consumption.
Solar power in homes is a different initiative that aims to promote the use of solar energy in households. Hydropower generation is a method of generating electricity from the flow of water. Smart meters are meters that measure electricity usage in real time.
All of these initiatives are important for reducing India’s reliance on fossil fuels and improving energy efficiency. However, the UJALA scheme is the only one that specifically promotes the adoption of energy-efficient lights.