Clear Rope Battery Light with 40 LED Lights-15 ft-WHITE These are Bright LEDs in a Clear 3/8" tube. Beautiful for weddings and other romantic settings. The lighted length is @13 ft. with a 2 ft. lead cord to place the battery box panel. The tube is 3/8" across or 1 cm. Can be used inside, and outside for short time not permanent.. The Lights are steady on only uses 3 AA battery and can last 10-12 hours.. The String is approxmately 15 feet with 4 inches of spacing between the LEDs.