Wallbox electronic timer switches can be installed in place of manual switches that allow the occupant to preselect a period of operating duration after which the lights will automatically shut off. These switches can be programmed to provide a warning signal before the lights are turned off. Timeclocks can be used to control lighting systems with predictable operating periods, such as security lighting and corridors. In addition, more sophisticated scheduling controls can be programmed for facilities having different daily operating schedules.