CB4000P Li ion Rechargeable Battery LED Video Light with High Color Rendering Index. The Bigblue CB-4000P LED Aluminum Video Light System delivers a stunning 4,000 lumens light output through COB LED, and an 120 degree perfectly even light spot. The 5000K warm white light reflects the true vibrant colors of the surrounding while diving. The light built-in 4 pieces Red LED to enhance focusing performance. 4 levels of brightness, Red color and SOS controlled by a reliable push button with battery indicator. The 18650x3 rechargeable Li-ion battery pack comes with a smart charger enabling you to charge the battery in a few hours. The 4 steps power adjustment lets you choose between four output levels - IV at 100%, III at 50% , II at 25% or I at 10% extending the burn time and reducing reflections at close range. Replaceable 18650 Li ion rechargeable battery pack BATCELL18650X3. Lanyard included