The night light can be switched between 3 colours: warm white, purple and blue. When light is no longer detected by the daylight sensor, the light will automatically turn on. The plug through function allows you to plug any UK style plug into the device so you do not lose the functionality of the plug socket and the night light will still operate as standard. Suitable for use with any UK square pin 13A domestic mains socket. Bulb Life: 20,000hrs; Colour Temp: Warm White