Re: "But how do I connect it to a lightbulb?"
> No, he is right. It's Duck Tape (brand name).
It is not only a brand name but it refers to the material used in the tape. 'Cotton duck' is a type of tightly woven cotton fabric, often used for tents. The name derives from the Dutch 'doek'. 'Duck tape' is made from duck fabric. 'Duct tape' is any tape which can be used to seal ducts (such as air ducts), and may be 'duck tape', 'Duck Tape (tm)' or other.