Xeleum’s Stairwell fixtures are specifically designed for use in stairwells and makes possible the reduction of energy usage by up to 85% by automatically providing fully ON light levels only when the space is occupied. Xeleum’s Athena (XS) is a 2' wall mounted stairwell fixture. The fixture is designed to operate at 29 watts input power. When the space is unoccupied the fixtures DIM to a power level of 7 watts.