Some are lit all night. Some are turned off at night. Planes landing after hours can sometimes use a radio frequency to turn on lights remotely for a time to

Some are lit all night. Some are turned off at night. Planes landing after hours can sometimes use a radio frequency to turn on lights remotely for a time to land. Not sure if all work the same, but it is possible. Edit: It is called Pilot Controlled Lighting. Some cool Youtube videos show it in action.