A black exterior and a copper coloured interior meet the trendy wall light billythe copper coloured design of the lampshade interior provides a great contrast to the dark design of the rest of the billy wall light to create a look that is both stylish and modern the light is reflected wonderfully by the glossy finish of the copper giving the light a more elegant appearance the e14 socket within the lampshade can be combined with traditional light bulbs up to 40 watts as well as energy effi