Swimmers compete either solo, in pairs or teams of 3 to see who can complete the largest number of laps in the time given.
The swim begins in daylight and finishes in darkness so for the final hour of the swim, with swimmers donning lights, glow sticks and tow floats to put on a light show for those on shore.
Laps are 1000m long for the first 2 hours and reduce to 500m for the final twilight hour. The current number of laps is displayed on shore so supporters & team mates can see how the scores are progressing.
Thorpe Lakes Aqua Park, Chertsey, United Kingdom, KT16 8PH
Sports Nutrition & Multisport Events based in Surrey, UK