The sun is our source of energy! Throughout the major portion of human history we have relied on the sun for light. Daylighting is an effective method to take advantage of the sun for illumination.
An autonomous robot is used to track the sun throughout the day. The machine has an on-board panel which maintains perpendicularity to the sun. Special lenses on the panel concentrate the sun's rays.
Total internal reflection is a phenomenon that allows light to travel long distances in transparent materials. Solar rays' can be funneled into optical fibers which are routed into a building for end use.