This clock does not tell time according to the hour of the day, but instead according to where the sun is located in the sky – how close or far to sunset and sunrise. It uses a GPS (so it's accurate no matter where it is in the world) and some mathematical formulas to figure out the location of the sun in the sky at the moment and spot on earth the clock is located, and then displays this information using light from micro-computer driven LEDs that moves up and down along it’s length. At dawn the light is small, yellow, and at the base of the fixture, at noon it is large and in the middle, and at dusk it is again small and at the very top. When the sun sets the light radiates oranges or pinks along the whole length of the fixture to celibate dusk along with the sunset. When the yellow light representing the position of the sun reaches the top, it changes to a bluish color and begins to move down throughout the night. It becomes large and in the middle at midnight, and small at the base at sunrise, when the cycle starts over again.