Caravan 208B
Situational Awareness
Ground Event / Encounter Loss Of Aircraft Control; Ground Event / Encounter Object; Ground Excursion Runway; Inflight Event / Encounter CFTT / CFIT; Inflight Event / Encounter Object
Flight Crew Became Reoriented
Human Factors; Weather
Aircraft cleared for ILS 16L approach (RVR 2200). I believe there was a 737 sequenced to follow. Approach lights visible from approx. 10 miles. I maintained 170 knots and flaps up configuration until DH. Approach light system visible at DH. Decision to continue to 100 HAT. Reduced power to approx. 800lbs; and as aircraft decelerated; deployed flaps 10; and began division of attention between inside and outside reference; focusing on acquiring threshold markings. The sequenced flashers (rabbit) was not on. I thought I saw the touchdown zone lighting. Reduced power further in anticipation of touchdown and deployed flaps 20. At that point; realized I was still over the ALS; initiated go-around. During the go around transition; the aircraft contacted the approach light system. As the aircraft ascended above the ALS; the runway surface was plainly in sight. Because of the apparent contact with the approach lights; landing was prudent. Touchdown on main gear was normal; and when the nose wheel subsequently touched down; the aircraft made an immediate hard left turn; the aircraft left the runway; crossed the grass median and was able to stop at the edge of TWY B.Coordinating a slower approach configuration with ATC (approach and tower) and full use of airport facilities equipment (i.e. use of the sequenced flashers during low visibility conditions).
C208B pilot reported contacting the approach light system on an instrument approach. Pilot elected to continue landing; and lost control of the aircraft after touch down.