The Great Exhibition, Crystal Palace, 1851: James Chance, of the glass-making firm Chance Brothers, is nervously showcasing a new lens, that, unknown to him, will revolutionise lighthouse production, propel his family business into a position of world leadership, save countless lives and have far-reaching consequences for trade, empire and the map of the world.This is where "Lighthouses" begins. The true-life story that follows is of one man and his family's unexpected role in an exciting ...