The Symbiosis Lighting System is a brand new flash/light system from i-Divesite. They are a combination of both flash and LED light in one unit, which is a really large benefit for most underwater photographers today. And WHY…? The short answer is, that most divers often do both photography and video – and that most new cameras do both equally good. So instead of having to invest in both lights for video and separately a flash for photography ID have combined them into one. …and it works!!