Abstract: A light control and indicating device including a main component adapted for mounting in a cavity of a wall, and a cover plate fitted thereover. The main component includes a frame or holder on which are mounted a plurality of operating members (referred to below) and those members have indicating elements exposed through, or slightly projecting through, openings in the cover plate. Those operating members include: a switch for connecting with control wires leading to electric lights in the room in which the device is located; a temperature sensor or thermometer having a sensing element in a body of air exposed to the room but shielded from cold air in the spaces in the wall, and including a read-out dial; a location-indicating signal light; and a time piece having a read-out dial.