Holidynamics bulk socket wire for building custom light lines: a 1000' C9 spool with 24" spacing on white SPT-1 wire; 25' C9 stringers with 15" spacing on green SPT-1 wire (pack of 25); a 500' C7 spool with 12" spacing and Holidynamics' collar sockets, whose molded lip seals tighter around each bulb to keep moisture out; and a 300' E27 Ed