Which type of lighting is typically unsuitable for underwater pool lighting?

Incandescent lighting is typically unsuitable for underwater pool lighting due to its design and operational characteristics. This type of lighting generates a significant amount of heat, which poses a safety risk when used in water. The high temperatures can damage the fixture itself and potentially lead to failure, creating hazards for swimmers.

Furthermore, incandescent bulbs are less efficient and have a shorter lifespan compared to options such as LED or halogen lighting. Wet niche lighting, on the other hand, is specifically designed for underwater use and ensures safety and durability in aquatic environments, while LED and halogen lights are generally more energy-efficient and offer longer-lasting performance without generating excess heat.