■Strobe Light

A strobe light produces a strong flash at regular intervals, similar to a camera strobe.
It is commonly worn by the dive leader to help team members locate and identify the leader.

A strobe can also be attached to a surface marker buoy (SMB) to make the buoy easier to see at the surface.

■Marking Light

Attach a marking light to the regulator first stage so that other divers can easily identify your position.

Battery-powered models are available, but disposable chemical lights (which glow through a chemical reaction) are commonly used because they do not require batteries.
Chemical lights come in various colors. Using different colors can help identify the tail end of the team or new divers.

■Shore Light

If the boat or shore entry area is not equipped with lighting, shore lights are essential for night diving.
Shore lights illuminate the entry/exit area and help divers prepare for a night dive.

Keep the light on during the dive so divers can identify the exit point from the surface.

A gas lantern is often more reliable than a battery-powered light.

Car headlights may also be used as a substitute.