Stiffel Lamp Shades, and Lamp Shades. If you need a shade, come to us. Make sure the lamp is positioned at just the right height. Led lights are beginning to see increased home and auto use, replacing incandescent bulbs. Ideally one would pick the appropriate lamp for a given application task, accent, wall wash and then find a track head that will hold it. In the 18th century, spermaceti, a wax obtained from the heads of whales, was introduced for candles. Adaptationthe process by which the eye becomes accustomed to varying quantities of light or to light of a different color. Reflectionthe atoms in some materials hold on to their electrons loosely. Low voltage lighting is also used in home gardens and to light the outside surrounding houses.