Night skiing refers to the activity of skiing on snow-covered slopes after the sun has set, typically under the illumination of artificial lights. Full definition
Lift tickets from that day are valid for night skiing. (skifernie.com)
Also offers night skiing, restaurants, equipment rental, repair shop, hiking routes. (undiscoveredhungary.com)
Also note that lift tickets purchased online are «all day» lift tickets which means they include night skiing when available on the same day. (bigwhite.com)