BOS Above Ground Klear-night LED Pool Lighting System Very bright submersible LED light fixtures feature 21 individual LED bulbs No holes to cut in your pool for mounting. Lights can easily be moved and relocated Easily attaches to pool wall with magnets and magnet holder. Simply put light fixture with magnet on inside of pool and magnet holder on outside of pool Each unit can support up to seven light fixtures (additional light fixtures and extension cables sold separately) Completely safe using 12 Volt DC power and water proof cable connection housings