Somebody might be supplying artificial light from above the cloud layer.
At least their nuclear reactors can run for that long, supplying all the heat, light, fresh air, fresh water and power they need.
Ghere entered without speaking, and Trystin flicked on the interior lights, although the window-overlooking the med center gardens-really supplied enough light.
Each room had a small circular window supplying light.
In 1928, an agreement was reached with Calgary Power to supply light, heat, and power to the town for the first time.
It was built on a turntable so the window could rotate toward the sun throughout the day, supplying natural light for the productions.
A windmill supplied water and carbide lanterns supplied light.
Searchlights and flares were distributed to provide illumination at night, and a flare plane was made available to supply additional light on call during the hours of darkness.
That thing would supply power and light for half the Ship.
In the Paris of Verne's era, the roads were rutted, and mud-splattered gas lamps and candles supplied unsteady light.