The Sea Dragon 4500 Pro Photo/Video light delivers 4500 true lumens in a smooth, even 120 degrees wide beam without hotspots. Its unmatched 96 CRI (color rendering index) COB LED array mimics natural sunlight and adds natural brilliance to your videos and stills. The Sea Dragon 4500 is truly a professional's video light with a Television Lighting Consistency Index (TLCI) value of 97, which makes it one of the best performing underwater lights in terms of capturing true and natural colors. Brightness can be adjusted manually or automatically with its built-in photocell light sensor. The Auto Brightness mode automatically adjusts from 450 to 4500 lumens to preserve your eye's natural night vision while extending battery life. Aim the light at your dive computer or other close-up objects and the light will dim automatically. Aim the light at far away objects for maximum brightness. When a nearby flash fires, the light detects the strobe and will turn off for 1 second for optimal image exposure control. The Auto features can easily be turned off any time underwater. The light head includes standard YS adapter and Flex-Connect YS Adapter, for easy expansion with any mounting system or SeaLife's own Flex-Connect system of arms, grips, trays and mounts. Also included is a powerful 50W Li-ion battery, battery charger and travel case.