Macris MIU Mini 12V Underwater LED Light Royal Blue.

MIU MINI is a powerful and hardwearing underwater LED light option ideal for small leisure boats averaging 4-6 metres. Measuring only 93mm wide, 50mm high and 7mm deep, the ultra-thin and impact-proof, MIU MINI generates a 1200+ fixture lumen and will penetrate on average 5 to 6 mtrs in most water conditions. It has 1mtr of twin sheathed cable and the unit is designed to be glued, rather than screwed on. See last picture for installation instructions. There is also installation instructions in the box.