Need replacement bulbs? Want to build your own string light and pick your cord and bulbs separately? Choose from either LED or incandescent bulbs in three socket sizes — medium, C9 and C7. Medium (E26) base bulbs come in different bulb shapes including globe lights, Edison-style bulbs, premium, professional and more! The C9 (E17/intermediate) base bulbs also have a variety of bulb shapes including globe style, traditional pointy Christmas bulbs, premium, professional and more. C7 (E12/candelabra) base bulbs are the standard round globe light style.