Novelty Lights SPT-1 wire stringer (E12) candelabra base for incandescent and C7 LED bulbs is perfect for creating your stunning holiday lighting extravaganza. Our C7 strings can be used indoors and outdoors for lighting up your roofline， fenceline， trees， and windows. Our C7 strings are made with 25 high quality sockets with each having a 6 lead/tail wires. Each string comes with a 5 amp fuse with 1 extra fuse included inside the male plug. Bulbs are sold separately.