BigBlue 1000 Lumens HL1000 Head Lamp Angle Of Light Beam: 120-degree Wide beam Light Source: 2x XML LED + 2x XPE Red LED Light Output /Burn Time: 100 Lm (level I), 250 Lm (level II) 500 Lm (level III), 1000 Lm (level IV) / 20hrs (level I), 8hrs(level II), 4 hrs(level III), 2hrs (level IV) Aluminum alloy light head; polycarbonate body Power Source: Li-ion rechargeable battery pack 18650