Diving Safety Lights

Choose based on depth rating (match or exceed your planned dive depth), lumen output for visibility needs (higher lumens for open-water or search tasks), beam type (spot for distance, flood for area illumination), battery type and runtime, mounting options (handheld, helmet, arm), and durability features like impact resistance and corrosion-resistant materials

Look for lights rated for the maximum depth you plan to dive—common ratings include 30m/100ft for recreational use and 100m+ for technical diving; many lights specify an IP or pressure-rated depth rather than an IP number alone, so confirm the stated depth rating

Aim for a runtime longer than your planned bottom time plus reserve; many safety lights offer 2–6 hours at lower output and shorter runtimes at maximum output, so check runtime at the brightness setting you intend to use

Rechargeable batteries (Li-ion) are common for convenience and long-term cost efficiency, but ensure you have a reliable charging routine and spare power; disposable batteries can be useful as backups if you prefer quick replacement in remote situations

For signaling and safety identification, 50–200 lumens is often sufficient; for general swim-throughs, photography, or search tasks, 300–1000+ lumens may be needed depending on depth and water clarity

Rinse with fresh water after each saltwater dive, open and dry battery compartments per manufacturer guidance, replace O-rings or lubricate them regularly, inspect seals and switches for corrosion, and store charged but not fully topped-off batteries if recommended

Common options include wrist/arm mounts, helmet mounts, handheld grips, and clip or D-ring attachments; choose a mounting style that keeps the light accessible, secure, and aligned with your task (e.g., hands-free helmet mount for tech diving, wrist mount for quick signaling)