This is the BigBlue 1000XW Underwater Scuba Diving Head Light Lamp 1000 Lumen Headlamp Features: Light Source:2x XML LED + 2x XPE Red LED Light Output: 100 Lm (level I), 250 Lm (level II), 500 Lm (level III), 1000 Lm (level IV) Casing Material:Aluminum alloy light head; polycarbonate body Power Source:Li-ion rechargeable battery pack 18650 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), 20 hrs (level I) Maximum Depth:100 m tested Size: Body Dia: 36.8mm; L: 84.4mm - Light head Dia: 38.8mm Weight:207g (including battery) Bouyancy:-76g (including battery) Switching System:Push-button with battery indicator Front Glass:Tempered optical glass Sku:HL1000XW This head-mounted light boasts 1,000 lumens of power. It&';s mounted on an adjustable head-strap which fits most head sizes, and is powered by a rechargeable 18650 Li-ion battery.