IN-POOL LIGHT: Although an option, the underwater light is installed in most pools for swimming at night. If the bulb burns out, consult your local pool professionals to purchase a replacement bulb. It is helpful to know the manufacturer of the light assembly. You will definitely need to know the voltage (either 12 volt or 120 volt) of the light as well as how the bulb is inserted. This, along with all your other equipment and accessories, is a great reason to utilize your equipment registration form.