watch 02:45 The Loop (Games) Do you like this video? Yellow 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 Bulbs on a Christmas Tree. Update Info v1.2.2 Added to the game. Retrieved from "https://terraria.fandom.com/wiki/Yellow_Bulb?oldid=513994" Categories: Items PC 1.2.2 Decorative Background Limited Availability Christmas Purchasable Items Community content is available under CC-BY-SA unless otherwise noted.