Prudhoe is a massive oilfield. It's thousands of wells spread covering an area around 200k acres. Every well pad and facility has lighting. Oilfields operate 2

Prudhoe is a massive oilfield. It's thousands of wells spread covering an area around 200k acres. Every well pad and facility has lighting. Oilfields operate 24/7 so the lights are always on. Of course there's ~24 hours of daylight for half the year on the North Slope and ~24 hours of darkness in winter.