The StairLite 2 is designed to satisfy all stairwell lighting requirements in one easy to install package. The StairLite 2 is a surface mounted, two lamp fluorescent lighting fixture that incorporates an integrally mounted ultrasonic motion detector, a system display panel, and an optional battery backup. Either one or both lamps can be controlled by the motion sensor. Bi-level lamp operation is standard so that one lamp will remain on constantly for securityand the motion detector will activate the second lamp as needed tosignificantly reduce the operating cost. Self powered.