When considering solar control, most think of reducing heat gain. There is no question this is a significant part of what an effective exterior shading system should achieve. However, energy from the sun also includes the visible spectrum so the control of natural daylight is also important. An effective solar control system appropriately deals with heat gain while allowing as much natural daylight into the building as possible without causing glare issues for occupants. By controlling heat gain, reductions in the size and running costs of the HVAC system can be achieved.