Systems, devices, and methods for a decorative outdoor light fixture that can include an adjustable motion sensor with a rectangular coverage pattern. An adjustable motion sensor for a light fixture can include an outer housing connected to a light fixture frame, a movable sensor assembly including a motion detector contained within the outer housing, a lens covering a portion of the outer housing in the path of the motion detector sensing beams to direct the sensing beams in a rectangular coverage pattern, and a sensor adjustment mechanism accessible from an exterior of the outer housing to allow a user to rotate the sensor adjustment mechanism to cause the motion detector to move upward and downward. The adjustable motion sensor covered with a fixed window that hides the motion sensor assembly from view.