One of a series of storm panes that were kept as supplies for glazing the light room at Kinnaird Head Lighthouse. The small triangular panes set in a iron frame were designed to withstand exposure to extreme weather conditions. During the Second World War, the lantern was also strafed by an enemy plane, chipping some of the glass prisms which can still be seen in the lens today. Lighthouses were often targeted by the Luftwaffe.