August 26, 1984.  Coastguardsman Patrick Doherty adjusts the lighhouse lamp while standing in the middle of the second-order Fresnel lens imported from France in 1859. The assembly is 11 feet tall, comprised of 336 individual prisms with 12 bullseyes. The light Doherty is cleaning is a 1,000 watt lamp, magnified to 2,000,000 candle power by the Fresnel lens that's visible for 27 nautical miles on a clear night. The second lamp is for backup.