The UJALA scheme (Unnat Jyoti by Affordable LEDs for All) promotes the adoption of:

Energy-efficient lights
Solar power in homes
Hydropower generation
Smart meters

The UJALA scheme (Unnat Jyoti by Affordable LEDs for All) promotes the adoption of energy-efficient lights. It is a government of India initiative to provide energy-efficient LED bulbs to households at a subsidized rate. The scheme was launched in 2015 and has so far distributed over 300 crore LED bulbs. The scheme has been successful in reducing India’s energy consumption and carbon emissions.

Energy-efficient lights are lights that use less energy than traditional incandescent bulbs. They are also more durable and have a longer lifespan. Energy-efficient lights can save money on electricity bills and help to reduce greenhouse gas emissions.

The UJALA scheme is a part of the government’s efforts to promote energy efficiency and conservation. The scheme has been successful in reducing India’s energy consumption and carbon emissions. It has also helped to improve the quality of life of millions of Indians by providing them with access to affordable and reliable lighting.

The other options are incorrect because they do not promote the adoption of energy-efficient lights. Solar power in homes is a renewable energy source that can be used to generate electricity. Hydropower generation is a process of generating electricity from the flow of water. Smart meters are devices that measure and record electricity usage.