Patent ID: 8115185

Claim:
A system for controlling light emitted from a light source in an environment having ambient light, the system comprising: an LED which emits light wherein the light emitted from the LED has an intensity; a detector which detects the intensity of the light emitted from the LED; a control circuit which monitors the intensity of the light detected by the detector wherein the control circuit is electrically connected to the detector and the LED and further wherein the control circuit regulates the intensity of light emitted by the LED; and a tower having an internal compartment that surrounds the detector wherein the LED is located outside of the tower and further wherein the tower prevents exposure of the detector to the ambient light wherein the tower has an external surface and a pathway wherein the pathway is located between the detector and the external surface wherein the pathway transmits the light emitted from the LED directly to the detector in the internal compartment wherein the pathway extends from a position adjacent to the detector through the tower in a direction toward the LED.