The lindam night light set is perfect for use in the nursery hallway and on landings the automatic nursery safety sensor light has a dusk til dawn sensor detecting light levels automatically switching on at dusk and off at dawn light remains cool to touch the plug light uses a long life ultra low energy bulb switching on and off at the mainssoft reassuring blue glow to help comfort your childdusk till dawn sensor detects light levels automatically switching on at dusk and off at dawnl