Dual infrared motion sensors – mounted on each end of fixture for accurate motion detection, rotate to optimize desired coverage. Bi-level operation – 26W, 3000 lumen light output when motion is detected, dims to 33% (8W) output when motion is not detected. On time and detection zone are adjustable using optional remote control (#98992). High efficacy - 115lm/W. Ideal for stairwells, passageways, parking garages.