The Aeronautical Information Manual (AIM) specifically encourages pilots to turn on their landing lights when operating below 10,000 feet, day or night, and especially when operating

Explanation

Under the FAA's voluntary 'Operation Lights On' program, AIM 4-3-24 encourages pilots to turn on landing lights below 10,000 feet, day or night. It singles out operations within 10 miles of any airport, in conditions of reduced visibility, and in areas where flocks of birds may be expected. The AIM does not single out Class B airspace, and its distance is 10 miles of any airport, not 15 miles of a towered airport.