A device for preventing secondary light emitted by a laser sight from being seen is disclosed. The device includes a cavity defined by a sidewall and first and second ends of a light containment structure. In some embodiments, the light containment structure is mountable so as to receive light from a laser sight of a weapon through a first opening located at the first end of the light containment structure. The device can include a first portion located at the second end of the light containment structure, and a second opening defined by the first portion and that can pass light from the cavity toward an object such that the object is illuminated to a user of the weapon by the light from the second opening. In some embodiments, the cavity can be configured such that light does not directly illuminate the sidewall.