Selectable beam lens for underwater light

A lighting device for a wet environment, the lighting device comprising:

• a fixture for location within the wet environment and having an interior with an opening;
• multiple light sources located within the fixture interior;
• and
• a lens located in front of the fixture and the light sources located therein, the lens enclosing the opening from the wet environment;
• wherein the relative position between the lens and the light sources is variable to align different light-directing areas with the light sources and provide different light beam patterns for light proceeding from the light source through the lens and into the wet environment dependent upon the different light-directing areas and light source alignments resulting from the position variation,
• wherein one of the light-directing areas includes elongate protrusions that are parallel to each other, and another of the light-directing areas includes hemi-spheroid protrusions.