EggLite only: excludes transformerIncludes 3-way adapter.Low voltage lightDichroic lenses are unaffected by UV or chlorine Magnetic baseIncludes mounting standClear lens and four color glass lens set2-1/8" x 3-1/2" with baseSpecify 10 or 20 watt10 watt submersible or open air; 20 watt submersed only