Lancer Tactical CA-766B Weapon Mounted Light in Black High intensity CREE LED with 220 lumens output Durable impact-resistant blended resin polymer construction Integrated MIL-STD-1913 compatible RIS clamp/locking system 4 programable light modes - momentary light, momentary strobe, constant on, and constant strobe Beam distance: 425 ft., Beam diameter: 27.5 in.