The Sector 5 Packs A Powerful 550 Lumen Beam With The Convenience Of A Pistol Grip For Momentary Or Constant Illumination. Four C-Cell Batteries Minimize Bulk While Providing 24 Hours Of Burn Time. The New Trigger Switch Design Is Easy To Use With Gloved Hands; Access Momentary On Via A Half-Pull And Constant On Via Full Pull. The Switch Also Locks Out To Prevent Accidental Illumination And Battery Drain While In Transit Or Storage.