4 Pack Solar String Lights The product includes 4 strings of lights, each string of lights has 120 bulbs, 33FT long + 6.5FT lead wire, the green wire perfectly matches the color of your Christmas tree. Upgraded solar panel with higher solar energy conversion, provide longer time lighting. Solar Twinkle Light The solar panel can be adjusted 180 degrees, and the solar panel has a built-in rechargeable Ni-MH battery. It can work up to 8~10 hours at night after fully charged under sunshine for 6~8 hours. Please turn on the device before charging, it will automatically charge and light up. Make sure the solar panel is placed in a sunny place and the solar panel is facing the sun.