Battle Island Light, Lighthouse on Battle Island, Thunder Bay District, Canada.

Battle Island Light stands on the westerly point of Battle Island, 28.5 miles east-northeast of Lamb Island Light on the Canadian shore of Lake Superior. It was built as a white light visible for 18 miles in clear weather, with a bright flash every four seconds, then a bright flash every 16 seconds, and a lower-strength light on a 12-second constant/12-second eclipsed cycle. Its fog diaphone sounded for 3½ seconds, then stayed silent for 26½ seconds.

A wooden lighthouse was first built in 1877 to guide ships across the lake. Between 1915 and 1916, it was replaced by the current concrete structure to handle increased shipping traffic in the region.

The light's flash pattern was distinctive: a bright flash every four seconds, twice, then a 16-second interval, with a weaker light on a 12-second cycle. Its fog diaphone sounded for 3½ seconds, then stayed silent for 26½ seconds, a rhythm keepers and passing crews learned to read.

The lighthouse operates fully automatically and can be viewed from the water since the island itself is not accessible to visitors. The best views of the structure come from a boat or ship passing nearby on the lake.

In 1953 a moose arrived on the island and caused such disruption that the lighthouse keepers had to arrange its relocation. This unusual event remains an odd chapter in the tower's history.