Doppler motion floodlight combines Doppler radar with traditional passive infrared sensor (dual technology). Reliable and provides a stable performance. Motion sensor turns lights on automatically when motion is detected and off after a preselected time delay (1 or 2 minutes). Detects lateral movement plus movement towards and away from the home. Ideal for wall or eave mount applications. Requires (2) 100 watt maximum PAR bulbs, sold separately.