Indoor/Outdoor. Lighted Length: 18 ft. (5.4 m). Total Length: 19 ft. (5.7 m). String to string. Steady burning. UL listed. Perfect for creating an elegant icicle look along rooflines and decks. If one or more bulbs burns out, others stay lighted. For indoor and outdoor use. 120v 60 Hz AC. Made in China.