Daylighting is a term used to describe the practice of using natural light to brighten up the interior of a home. It can be done by employing several different methods. One common way is by installing skylights. If you decide to do this, make sure they are double-paned and that the flashing is done properly.
Another effective method of daylighting is with clerestory windows. Set high on a wall, these short but wide windows allow the sun to flood into a room during the winter months adding light and heat, but at the same time are protected from the sun in the summer by the roof overhang.
Light tubes are another way to evenly distribute daylight. They do this with a special lens made to amplify low-level light but reduce the intensity of light from the sun at midday. The tube itself is coated with a highly reflective material that channels sunlight through it. It then enters the interior space through a diffuser which evenly distributes the light.
These are just a couple of the methods used to incorporate natural light into a home instead of relying solely on electrical lighting to do it for you.