What type of lighting is commonly used for underwater pool lighting?

LED lights are increasingly used for underwater pool lighting due to their energy efficiency, longevity, and low heat output. They are designed to withstand the moisture and pressure conditions of being submerged in water. Being energy efficient means they consume less power, which can lead to significant savings on electricity bills over time, making them a popular choice for pool owners.

Incandescent lights, while traditional, are less common now for underwater pool lighting due to their higher power consumption and shorter lifespans compared to LED options. However, they can still be found in some pool installations, though they are being phased out in favor of more energy-efficient types.

The other options, such as fluorescent and CFL lights, are not typically suitable for underwater use because they are not designed to be waterproof and do not have adequate safety certifications for such applications. Halogen lights, while better than incandescent in terms of energy efficiency, still do not match the benefits provided by LED technology for underwater applications. This combination of LED’s efficiency and the option of using incandescent lights highlights the practical considerations in selecting lighting for pools, leading to a strong preference for the chosen answer.