Complex sentence: The lighthouse was deactivated after its light became obscured by nearby buildings and was decommissioned on 12 July 1952 with a new lighthouse being built in Galbokka Point, Colombo.
Split into simpler sentences: The lighthouse was deactivated after its light became obscured by nearby buildings and was decommissioned on 12 July 1952. A new lighthouse was built in Galbokka Point, Colombo.