Daylighting is the controlled admission of natural direct sunlight and diffused skylight into a building in order to reduce electric lighting and save energy. Outdoor illumination is varied and dynamic, and daylighting captures this, providing a visually stimulating and productive environment for building occupants which reducing as much as one third of total building energy costs. A daylighting system is comprised of daylight apertures, such as skylights and windows, as well as a daylight-responsive lighting control system. This means that when it is darker outside, the lights inside will become brighter, and vice-versa. The location of building windows, and use of blinds or shade is also important.