HEADSUP LITE™ RECOIL 2680™ LED headlight uses a 1 watt LED that's aimed backwards into the reflector. 100% of the light is captured and aimed forward as a tight collimated beam that's as bright as an incandescent. The body is made of tough ABS resin that's corrosion proof, submersible, and virtually indestructible. It is powered by 4 AA alkaline cells (included) and comes with a rubber strap for hard hat use and an adjustable cloth strap for bare head. 79 lumens light output, 123 meter beam distance, 3789 candela peak beam intensity, IPX7 water proof.