Metro Marine High-Output Surface Mount Underwater Light w/Intelligent Full Spectrum LEDs - RGBW, 45 Beam [F-SMR1-FS-45]High Output Surface Mount Underwater Light with Intelligent Full Spectrum LED's RGBW, 45 Beam The F Series line of underwater marine lighting fixtures is designed to mounted a depth of up to 4. 6M (15') below the waters surface to provide vibrant color and color changing light in the water. With watertight aluminum bronze housings and silicon bronze hardware, Metro Marines F Series luminaires are perfect for marine based applications such as mounting