The TetraPond TL3 Triple Light Set can be used underwater or outside of your pond. Incredibly innovative and energy efficient design, a light sensor automatically turns on at dusk and shuts off at dawn! Hassle free! Complete set includes: three low-voltage 10 watt light fixtures with MR11 bulbs, a 12 volt transformer with 120 watt power supply, 20 foot light cable. 3 red, 3 yellow and 3 blue lens covers are also included to give you tons of choices for color combinations. Includes 1 year limited warranty.