General underwater lighting refers to the non-L.E.D lighting systems like the regular tungsten filament lighting fixtures , halogen lighting fixtures etc., these systems are under the same category as more or less they use the same over heating of the filament technique to produce light. There are two types of lighting which are used underwater: Strobes (AKA flashes) and Video Lights (Constant LED Lights). Underwater Video Lights are more popular than strobes since they allow shooting both video and stills. The most commonly used types of underwater lighting are video lights and strobe lights. Strobe lights, also know as ‘flash’, are simply xenon light bulbs that deliver a very powerful flash of light for short period of time.