Equally important to the selection and placement of artificial lighting is the effective use and control of natural lighting. The concerns of lighting for daily activities and the annoying intrusion of glare present equal obstacles when dealing with natural light from the exterior of the living environment. How often have we seen the misguided introduction of a large glazed pane at the end of a corridor with the intent of bringing natural light into the interior of a building? The result can be terribly harsh on the observer facing or walking along the corridor during daylight hours.