Tech-Line Supplement Light Chain with 45 LED Lights. The String Light is 4.5 m long and is delivered with an extendable plug. With Tech-Line light decorations from Sirius, you can extend your system every year. Connect light chains, nets or ice crystals and take your lights in different directions over the windows or shrubs – All on just one cable. The only limit is that you may use up to 8000 LED lights in the same socket.