Holiday Lighting Outlet C7 Christmas Stringer Bulk, 12" Spacing, Candelabra Base (E12), SPT-1 7 Amp wiring, 1000' Reel (White, 12" Spacing) 1000' 7 Amp Wire with either 2000, 1000 or 800 sockets. 6", 12" or 15" spacing between sockets. Compatible with LED or incandescent bulbs with E12 Candelabra (12mm) bases. Use with E12 base bulbs including C7 and G30 Male & Female plugs sold separately. Compatible with easy to use SPT1 slip plugs. Max Run = 6" Spacing - 120 Sockets (60 Feet) with 7 Watt Incandescent Bulbs or 600 Sockets (300 Feet) with 1 Watt LED Bulbs. 12" Spacing - 120 Sockets (120 Feet) with 7 Watt Incandescent Bulbs or 600 Sockets (600 Feet) with 1 Watt LED Bulbs. 15" Spacing - 120 Sockets (150 Feet) with 7 Watt Incandescent Bulbs or 600 Sockets (750 Feet) with 1 Watt LED Bulbs. "Calculate for Amp Needs: # of Bulbs x Watts/Bulb = Total Watts Total Watts / 120 volts = Amp Needs"