Light head constructed of machined anodized billet aluminum. Body construction: Delrin Acetal resin. Body diameter: 35 mm. Head diameter: 59 mm. Length: 23 cm. Weight: 840 g. Beam divergence: 12 degrees. Kelvin color temperature: 5500. Lumen output: 1000 lumens (15,000 LUX @ 1 meter), with fresh batteries. Proprietary reflector. Pressure depth: 600 ft. Run time: 3 hr with fresh (standard C) batteries. Twist on/off.