The main part of the light’s fitting is recessed into the wall, which means you need an 82mm diameter hole cut into your bedroom wall or headboard. The back plate for light itself measures 105mm in diameter. The light is wired directly into the 240 volt supply.The head of this recessed reading lamp can be tilted or twisted so you can direct the beam of light exactly where you want the light to fall to make reading in bed as comfortable as possible.This 3 watt CREE LED light is finished with in black adding to the modern look of this light. Comes with a 3 year guarantee and is extremely energy efficient.