Submersible Pond Lights Ideas for your pond and pool. check this out as your inspiration pictures. If you have decided to use the ultra violet lights designed for ponds, it is important to learn all that you can about using this type of system in your pond. There are four necessary components required to work together, successfully killing the algae in your pond. You will need to purchase the initial ultra violet light that is designed especially for a pond, a protective sleeve designed to protect the ultra violet lamp from the water, the proper electrical equipment to insure that the ultra violet light designed for your pond functions properly and the housing that will actually hold the light itself and allow the water to pass through. The ultraviolet rays will only kill the algae in water that passes through the housing unit.