Lighting Sustainable Sources 1994-2000. Lighting Sustainable Sources 1994-2001. Daylighting optimizes natural sunlight entry into a building to minimize the need for artificial lighting.
Artificial lighting is produced by electricity.
Energy -efficient lighting is the use of artificial light to receive the optimal level of light for the lowest energy investment. The central concern associated with daylighting is the heat gain that can result when natural light is brought into a home. In our region, this is an especially important concern. During the heating season, the heat gain from natural light can be useful. When natural light strikes fabrics and some other materials, the UV rays can discolor and weaken the material.