Petty Officer 2nd Class Chad Dunlap explains the process of replacing the incandescent lamp in a lighted navigation aid with a light-emitting diode in Hilo Harbor Aug. 28, 2013.The Coast Guard Aids to Navigation Team, Honolulu, is responsible for "lighting the islands," conducting routine maintenance and LED conversions on Hawaii's navigation aids. (U.S. Coast Guard photo by Petty Officer 3rd Class Melissa E. McKenzie)