You just set up your equipment for the first night dive of your vacation in Saint Somewhere, as you turn on your dive light to checkyour gauges the light beam fades. The worst thing that could happen before a night dive just did! Your dive light bulb is dead. For the Sea Torch, Sport Diver and Pro Diver, This color specific lamp include a heat protection shield, it has a 10 degree angle which is measured from the center out. Never leave for your holiday without some spare bulbs. Don't forget batteries for your light!