It is often seen that the swimming pool has underwater lighting that provides better lighting for the bottom of the pool. The various lightings in the swimming pool and its surroundings constitute a relatively rich three-dimensional lighting, and can also obtain better visual effects.
The United States is beautiful, the underwater lighting of the swimming pool has many drawbacks. I do not recommend this design. The specific reasons are as follows:
1. System is complexity
The underwater lighting system is much more complicated than the water lighting system. The power supply requires 12V and below, and the safety isolation transformer is added to form a unique SELV system.
2. Construction requirements are relatively high
The underwater lighting system has high requirements for construction. If it is slightly inadvertent, water leakage and leakage will occur, causing accidents.
3. High requirements on products
The underwater lighting system requires a high level of luminaires and the degree of protection to the most stringent IP78.
4. Large maintenance workload
Underwater lighting fixtures have a large workload. Since the lamps are in the water, the swimming pool lighting needs to be drained for maintenance during maintenance. On the one hand, the workload is large, and on the other hand, the water resources are wasted.
Due to the complexity of the system, the number of components and equipment, the initial investment has increased significantly.
5. Short life
Because the environment in which the lighting system is located is worse than the normal environment, the system is easily damaged, the life is relatively short, and the cost performance is not high.
An outdoor swimming pool
Figure 1 shows an outdoor swimming pool. The underwater light system has been damaged. It was completely discarded in less than 2 years and changed to a water lighting system (see Figure 2).
Water lighting system
In summary, the underwater lighting system is not recommended for swimming pools.
Many of the older swimming pool codes require 1.0 or even 0.5 watts/square foot of water surface area. Updated codes have taken the new aquatic trend of using LED-style lights into account, and have converted their measurement requirements to lumens/square foot. According to section 188.8.131.52.1 of the Model Aquatic Health Code, “Underwater lighting, where provided, shall be not less than eight initial rated lumens per square foot of pool water surface area.”
The location of underwater light fixtures in a commercial pool setting is vital to a safe and a visually-pleasing swimming pool. Depending on the shape and the intended use of the pool, a good general rule of thumb is to install LED flood light fixtures on opposing walls. For competition pools, it is not recommended to install fixtures at the ends of the pool, as swimmers need space for flip turns during competitions. It is important to ensure all tripping hazards and pool egress/ingress locations are adequately illuminated. This includes things like stairs, recessed steps, ledges and any slope transitions. Additional fixtures may be needed for swimming pools with deep water. For safety concerns, it is imperative that the entire floor of the pool is easily visible from the deck.