The ability to adjust the light inside is part of what can make a home more or less comfortable.
Most common use of natural light comes from the sun. If a place has plenty of windows, the sun illuminates most of the house for the duration of the day. When it is night, the moon is a source of light, but not sufficient enough for many activities. Artificial lighting makes it possible for people to continue activities such as reading, studying (homework), sewing, and other crafts.