NuDive 250 Lumens Diving LED Flashlight (100 feet waterproof) for scuba diving (uses 2 C size batteries) Using the premium USA made power LED by Luxeon at 250 Lumens(the inventor of the original power LED) True Underwater Spot Reflector technology provides a high beam distance for greater visibility. Durable construction can withstand a drop test of up to 10-feet without being damaged. Designed for professional diver. The dial switch is designed to be not affected by water pressure. Battery life: 35 hours (maximum output is 8 hours), Size: 7.2"x3.5", Weight: 468g with 2xC batteries