The overhead (warning) lamp on tower cranes is a safety measure for nearby air traffic. This lamp is used to reduce the risk of interference with air traffic due to the height of the tower cranes. The high position of the crane can be a hazard for low flying aeroplanes or helicopters. The overhead light indicates the presence of the crane to such aircraft and ensures that crane operations can be carried out safely. These lamps are mounted on the top of tower cranes to comply with air traffic rules and safety standards.