These lights will automatically illuminate at night for up to 6 hours on a full charge approximately. With no electricity required, they are easy to install & will charge in direct sunlight making them ideal for decorating trees, patios, gazebos, doorways & more. These flexible 100 LED copper wire solar firefly lights come with a 2V, 90mA solar panel & can easily bend to your desired shape. Approx Total Length: 200cm (10cm between each light) . They require 1 x AAA Ni-MH rechargeable battery (included).