This is the XS Scuba LT150 Dive Light 1000 Lumens 3 "C" Cell Batteries Features: Magnetic switch offers variable light output Brightness - 40 lumens to 1000 lumens Battery duration - 30 hours to 1 hour Depth rated to 330 ft / 100 m Beam distance - 1500 ft / 450 m Uses 3 C cell alkaline batteries (not included) The LT150 is the perfect size. It is big enough and bright enough to use as your primary night diving light, yet, it is not too big to get heavy in your hand. The knurled body, made from a single piece of high-grade aluminum, fits perfectly in the hand. Using common C-cells, this light boasts a maximum output of 1000 lumens! With a magnetic switch that provides variable power, you control the battery duration. Slide it up to 1000 lumens for a 1-hour duration or slide it back to 40 lumens and get an amazing 30-hour duration."