Throughout the twentieth century, the Green Cape Lightstation underwent the same technical advancements as did all coastal lighthouses in Australia. With responsibility transferred to the Commonwealth in 1911, the lightstation was converted from kerosene to electricity in 1962. In 1962 the tower was electrified with diesel generators serving as the power source. The manual winding system was also replaced with an electric motor. The lightglove used provided a light intensity of 475,000 cd. In 1967 improved generators were installed together with a 1000 W Tungsten-halogen lamp with an intensity of 1,000,000 cd, visible over . The light characteristic was changed to two flashes every ten seconds. At some later point, the power source was changed to the mains electricity. The lighthouse was then gradually de-manned over the next 30 years.