What type of light is required per diver in cavern diving?

In cavern diving, the primary light is essential for providing visibility in dark underwater environments. Unlike other types of diving where ambient light might be sufficient, cavern diving often occurs in areas where natural light diminishes quickly. Therefore, each diver must carry a reliable primary light source to illuminate their path, inspect their surroundings, and ensure safe navigation through the often confined and complex environments found in caverns.

The primary light not only aids in visibility but also enhances safety by allowing divers to see potential hazards, communicate with dive buddies through light signals, and avoid disorientation in unfamiliar terrain. This is in contrast to secondary or emergency lights, which serve as backups if the primary light fails, and reflective light, which does not provide direct illumination. Having a dependable primary light is a critical component of cavern diving safety and strategy.