No light bulb included! This cord is perfect for Selenite Lamps, Lighting up Pumpkins, Ceramic Houses, Tree, or Any Craft Project. Completely assembled 6 foot long white cord with On/Off Switch, end plug Socket is E12 (C7 Candelabra base) and clips into any hole 1 inch in diameter Socket takes up to a 40W candelabra base bulb and is metal lined for positive bulb contact. Components are U.L. listed.