Abstract: A doorlite system in which a doorlite is mounted in an opening in a door by means of an outer frame and an inner frame adapted to be screwed together, the outer frame has a body portion for insertion into the door opening from the outer side of the door, a flange for engaging the door around the perimeter of the opening and a flange for engaging the glazing unit or doorlite. Similarly, the inner frame has a body portion for insertion into the door opening from the inner side of the door and has a flange to engage the door around the perimeter of the opening and a flange for engaging the doorlite. The bodies of these frames having interengaging registering means extending continuously therearound. Further, the inner frame has a groove on its exterior side to house the heads of the securing screws and a snap on frame is provided to cover the screw heads.