These 50 LED Minilights are perfect for decorating the Christmas tree. Its just a personal choice as to how many lights you need. The sets are connectable and up to 20 sets can be joined on one power lead giving a possibility of up to 1,000 lights on just one plug. All that is needed is one set with a power lead and then just add on with exstension sets to achieve the desired amount of Christmas Lights. These LED Christmas lights are also very low cost to run.