The Fusion 400 Video LED Dive Light from Tovatec can be used on a recreational dive or an all-day expedition. The light produces a maximum of 400 lumens, with a maximum runtime of 1.3 hours on the included rechargeable 14500 battery or 5 hours on two user-supplied AA alkaline cells. The side-mounted switch features an LED battery status indicator and lets you select between power settings of 30%, 50%, 100%, or an emergency strobe mode. The light is 5.9" long, 1.4" in diameter, and weighs 5.3 ounces. It has an aluminum housing with a rubberized grip for comfortable handling. Slide the head forward or back to adjust the beam angle from a tight 12 for technical diving to a wide 100 for photography or video. The light head can be removed to expand the beam width to 140 for use as an emergency candle strobe or deck light. The light remains waterproof with the head off. A pressure safety valve located at the base of the light protects the housing and the operator in case of a battery malfunction.