The Bigblue FF4X5 750 Lumen AFO Aluminum Dive Light is a high-output underwater LED light with an Automatic Flash Off function. The light has been tested to a depth of 328' (100 m) and features a burn time of 2 hours on high and 5 hours on low. With a stunning 750 Lumen maximum light output, you'll have no problem seeing underwater. This light features a very even pattern with no hotspots or periphery rings to ruin photos or video. The Automatic Flash Off / AFO function gives you better control over lighting by turning off the light momentarily while your strobe is flashing opposite the light. The anti-corrosive anodized aluminum alloy casing ensures that this light is durable and able to survive the elements while still looking sharp. A lantern grip is included.