Create lighting drama when you use this heavy duty, SPT-1 stringer for your commercial Christmas lighting designs. This 1,000 foot, white wire spool has 800 intermediate sockets spaced 15 inches apart for use with C9 Christmas light bulbs, making it ideal to decorate exteriors and light stately Christmas trees. UL listed for indoor/outdoor use, the stringer has lead and tail lengths of 15 inches each. There are no end plugs, so you determine length and plug position. Don't let mismatched light sets stop you this holiday. Create a one of a kind holiday lighting display with a durable, economical, and reliable light stringer.