The main difference between concealed swimming pool lights and surface-mounted swimming pool lights lies in their installation and appearance. Concealed Swimming Pool Lights: Installation: Concealed lights are installed beneath the waterline of the pool and are not visible from the pool's surface. They are often built into the pool walls or floor during construction or renovation. Appearance: Since concealed lights are hidden, they provide a sleek and seamless look to the pool. The light source is submerged, creating a diffused and ambient illumination. Surface-Mounted Swimming Pool Lights: Installation: Surface-mounted lights are installed on the pool's surface, typically mounted on the pool wall or deck. They are more accessible and easier to install compared to concealed lights, making them a popular choice for retrofitting existing pools. Appearance: Surface-mounted lights are visible and can serve as decorative elements. They come in various designs and styles, and some may include color-changing features or special effects to enhance the visual appeal of the pool. Light Source (LED): Both concealed and surface-mounted swimming pool lights can use LED technology. LED lights are energy-efficient, long-lasting, and provide a wide range of color options for customizable lighting effects. Maintenance and Accessibility: Concealed lights may be more challenging to access and maintain since they are installed below the waterline. If there is an issue with a concealed light, it may require draining the pool or more extensive maintenance procedures. Surface-mounted lights are easier to access for maintenance and replacement. If a surface-mounted light needs attention, it can often be serviced without draining the entire pool. Choosing between concealed and surface-mounted swimming pool lights depends on factors such as the pool's design, construction stage, and personal preferences. Concealed lights offer a sleek and integrated appearance, while surface-mounted lights provide versatility and easy accessibility.