Latitude : 32 03.4S, Longitude : 115 43.9E

The following is from this - Guiding Lights website.
The South/North Mole lighthouses were designed by C.Y.O'Connor. The South Mole lighthouse was installed in 1903, the North Mole was not installed until 1906. The reason for the North Mole lighthouse being erected later was so that the new mole could settle. The original lighthouse meant for the North Mole was installed at Gantheaume Point, Broome. The towers were made of cast ron and were 30ft. tall. All the components that made up the lighthouses were handmade. These lighthouses can still be seen in use today. They are used as indicators to the entrance of Fremantle Harbour.
The first light used in the South Mole lighthouse was a dioptric white occulting light of the fourth order and was visible up to 12 nautical miles away. After the light was first lit, it was found to be too powerful and caused confusion with the Woodman Point lighthouse. Both could be seen past Rottnest by shipping coming into the area and it was hard to tell which was which. To combat this problem the harbour trust decided to put a fixed green light in the South Mole lighthouse and a fixed red light in the North Mole lighthouse.