Which factor is critical when ensuring adequate lighting in operation areas of pool facilities?

The critical factor when ensuring adequate lighting in operation areas of pool facilities is brightness level. Adequate brightness is essential for safety and functionality, especially in areas where lifeguards and staff need to monitor activities and conditions effectively. Proper lighting enhances visibility for patrons as well, helping to prevent accidents and identify any potential hazards quickly.

In a pool facility, especially in areas where water and movement may obscure visibility, having sufficient brightness ensures that both staff and swimmers can see clearly, identify situations that require attention, and navigate the space safely.

While considerations such as cost of installation, type of bulbs used, and design aesthetics are important in the planning and execution of a pool facility, they do not outweigh the necessity of adequate brightness in operational areas for health and safety compliance.