 Not long after, the lighthouse record was set in 1905 when the signal was used for an astounding 645 hours.Shoaling at Cape Henlopen gradually reduced the significance of the light and the Harbor of Refuge Light began to serve mariners in a more practical way at its location on the outer breakwater, much closer to the mouth of the Delaware Bay.As a result of its reduced importance, the light was officially discontinued in 1996.