The tower's completed height was 3m shorter than the design, and commissioning was finally completed in 1851 when the revolving lamp and clockwork mechanism were fitted.
The Argus reported on 31 July 1851[REF]"The light will consist of two groups of three powerful lamps each; the whole revolving once in two minutes, and showing a flash of light of five seconds' duration every minute, with intervals of 55 seconds of darkness.