TheSealife Sea Dragon 2300 LED UW Photo/Video LED Dive Lightboasts 2300 Lumens of brightness. Featuring a wide, 100-degree beam angle that's perfect for cameras with a wide field of view, the light operates with only a single button and quickly adjusts between 4-power levels. Powered by a rechargeable lithium-ion battery, the Sea Dragon 2300 will run for a full hour at 100 percent power and constant brightness. The Sea Dragon 2300 also features Auto Flash Detection that turns off the light for 2 seconds when an external flash is detected. TheSealife Sea Dragon Flashhas variable power adjustment and large controls that make it easy to fine tune brightness. Auto Mode automatically adjusts brightness for optimal exposure. The flash has an effective range of up to 8 feet / 2.5 meters, and a quick release button to quickly detach the head for aiming in hard to reach areas. The included snap-on diffuser allows for proper color balance and even lighting.