sentences:  An hour before dawn, aware that they were slightly north of their planned course and with their directional radio receiver not functioning, they spotted the Kīlauea Lighthouse as planned to verify their position.A radio beacon was added in 1930, and with the added generator the light was changed to be powered by electricity.Originally 250,000 candle power, the light reached 2,500,000 candle power in 1958.