The Atlantis 1409 is an ultra compact underwater fixture for use with a low voltage MR16 lamp. Its tiny 2-1/4" x 3-3/8" scale makes it ideal for placement in niches or between rocks in water gardens, fountains or streams. Various lenses, louvers and color or dichroic filters can be combined up to three at once to create multiple underwater lighting effects. The Atlantis series is designed for use in freshwater decorative ponds, fountains and water gardens. It is not suitable for use in salt water.