Dive Rite
Dive Rite was founded in 1984 and has been the one of the pioneering creators of technical Scuba diving equipment, especially in the production of canister lights. E.g. the EX35 boasts an impressive 4300 lumen output with a burn time of max. 6 hours or even about 24 hours with 1075 lumens.
Website: diverite.com