Yes as you have mentioned it maybe just an attempt to save electricity just like 'Artificial Moon' but the creation of such technologies can just change stakes and dynamics in international politics.
The ‘Artificial Sun’ is a major project involving scientists from 35 countries that aims to generate ‘new energy’ sources using nuclear fusion, and China is on course to finish building this before the end of this year, as per, the latest media reports. It is an attempt to create an alternative source of power and the Scientists hope that the ‘Artificial Sun’ will help harness the power of nuclear fusion. China is the first country in the world to develop such equipment on its own and all would be interested in learning more about this project and its viability and implications.