This is the BigBlue 450XW 120 Degree Underwater Scuba Diving Head Light Features: Light Source:2x XML LED + 2x XPE Red LED Light Output:45 Lm (level I), 113 Lm (level II) 225 Lm (level III) 450 Lm (level IV) Casing Material:Aluminum alloy light head; polycarbonate body Power Source:3x AAA batteries Angle Of Light Beam:120 degree wide beam Color Temperature:6500K Burn Time:2 hrs (level IV), 4 hrs(level III) 8 hrs(level II) and 20 hrs (level I) Maximum Depth:100 m tested Size:Dia. 36.8 x L. 84.4mm with light head dia. 38.8mm Weight:189g (including batteries) Bouyancy:-58g (including batteries) Switching System:Push-button with battery indicator Front Glass:Tempered optical glass Model #: HL450XW This head-mounted light boasts 450 lumens of power with a 120-degree wide beam. It&';s mounted on an adjustable head-strap which fits most head sizes, and is powered by (3) AAA batteries.