A pre-lit tree is an artificial Christmas tree which is pre-wired with Christmas lights. The lights are wrapped around the tree before it is sold, reducing set up time and making storage simpler. The lights cannot usually be removed from the tree because they are normally embedded within the artificial branches. The product may be sold as a kit - the user assembles the tree and plugs it into an electrical outlet - or the dealer may assemble it before the sale. Larger trees usually contain traditional strands of bulb lights or LEDs, while smaller tabletop trees may have fiber-optic branches. Pre-lit trees are categorised under the headings of electrical goods.