These night lights use low electricity consumption, with a cost of less than 30p for a whole year of use - based on 10 hrs/night at 16p/Kw (avg. Standard rate Jan 2013). Three long life LED's come on automatically at night and are perfect for bedrooms, hallways, landings and all around the home. With a sensor, it automatically lights up at night. These handy lights provide comfort for little ones settling to sleep but also help parents get safely around a dimly lit house while checking on sleeping children or doing night time feeds. Sizes H10.5cm W5.5cm D4cm. EAN: 5017329361663. WARNING(S):Only for domestic use.