Yellow and Green Bulb is an item that can be purchased from the Santa Claus NPC. It can be right clicked onto the Christmas Tree to decorate it. Yellow and Green Bulbs in a Christmas Tree. Update Info v1.2.2 Added to the game. Retrieved from "https://terraria.fandom.com/wiki/Yellow_and_Green_Bulb?oldid=513995" Categories: Items PC 1.2.2 Decorative Limited Availability Background Christmas Purchasable Items Community content is available under CC-BY-SA unless otherwise noted.