Pool lighting is ideal for nighttime swimming of any sort. Pool lighting can range from complex fiber optic lighting to a simple strand of patio lights. Pool lighting is either erected around the exterior of a pool, commonly floodlights on poles, or installed underwater on the pool's walls and floor. Underwater lights are made with durable, resistant glass and often use halogen or incandescent bulbs. Solar pool lighting is powered by the sun's energy. Solar lights can either float on the pool's surface or be placed on long posts and inserted into the ground. Multicolored fiber optic pool lights run through a cable and can either be placed underwater or around the pool's rim to illuminate a pool.