Love these lights!!! Purchased two strings, they are not very long, but that is what I needed for my space. The solar panel can either be used with the enclosed ground stake or clamped on a fence etc. with the sturdy clamp. I have the solar panels placed where they receive full sun for most of the day, this lights for a good 6-7 hours after dark! Some have said that the wire between the solar panel and where the lights begin is not long enough, but it is really long. Bulb are not the tiny kind... a good round bulb... (larger than a large Apricot.)