This is a lamp that follows the light of the sun. The light bulb (electricity) is programmed to follow the sun. When the sun rises in the morning the lamp starts to omit light, intensifying every second, shining brightest in middle of the day. After this the light begins to fade with the sun, appearing dimmest at sunset. You can`t see the light changing beacuse it omnit light in a very slow movement, but it changes all the time as the sun moves in the sky. A digital sun.