Powered by the sun, these string solar lights are incredibly power efficient. They charge for at least 4-6 hours and have an on/off switch. When turned on they automatically light up as soon as it grows dark outside and become even brighter in complete darkness. Crafted from dark green, flexible plastic cables which can be effortlessly wrapped and strung however you like. 100 high quality mini LED bulbs ensure ambient illumination. Waterproof and sturdy, these mini string lights are perfect for outdoor use in the patio or garden area.Total length: 32ft. Distance between each bulb: 4". Lead wire: 12"