China is reportedly in the process of creating an "artificial moon" satellite that would be bright enough to replace the streetlights in the south-western city of Chengdu by 2020.
The man-made moon is reported to be eight times brighter than the real moon, and could save hundreds of million of dollars a year in electricity costs.
The artificial moons will orbit 500 kilometres above Earth and shine on area expanding 10 to 80 kilometres wide.