This is the Promate Octagon Scuba Dive Light Narrow Underwater Beam Backup Light Features: Color silver and black Focus on one spot (Narrow beam) Light weight LED The Promate Octagon Dive light utilizes a special lens in place of a lens reflectorspecial type of lens rather than a reflector that provides a narrow beam to increase visibility in low vix diving conditions. The 8-sided rubber bumper around the lens helps stop the dive light from rolling back and forth on the boat.