Submariner-14S dive torch

A torch, not a video light: the 8 degree beam is a tight spot that reaches into places a wide flood only brightens the entrance of. That is what a torch is for in the Red Sea even on a day dive, because the interesting things live under the overhang: glassfish swirling in a crack, a lionfish parked upside down under a ledge, the holds of the Thistlegorm. At night it is also how you talk. Divers signal by moving the beam over their own hand or the sand in front of the buddy, never into a face, and a slow circle means OK. 2000 lumens lasts 1.5 hours on full and up to 24 on low, the battery can be swapped and charged over USB-C, and an indicator on the body turns red before it runs out.