There are several ways that you can light a pool at night. One way is to use floating pool lights. These lights are designed to float on the water's surface and provide a soft, ambient light. Another way to light a pool at night is to use underwater lights. These lights are installed beneath the water's surface and can provide a more dramatic effect. Also, you can use landscape lighting to illuminate your pool area. This type of lighting is often used in conjunction with other types of lighting to create a unique look.