The present light source, located 89 feet (27 m) above sea level, is a 1 kilowatt bulb, which produces a 50,000 candela beam visible under favorable conditions up to 15 nautical miles; 27 kilometers (17 mi). Formerly, the light had a rigid schedule of being lit one hour prior to sunset, and extinguished one hour after sunrise. With automation completed in 1975, a small battery-operated back-up strobe light was installed outside the tower, and the main light was turned on permanently.