Only downside is the advertised 20 feet of length is for the cables that string them together starting from the solar panel to the other end. Basically half of the advertised length is cable on the outside of the two edge lights(between first bulb and solar panel and between past bulb and end of cable.) the actual lights cover about 10 feet. Not very bright which is what I was looking for but be aware of that. They last several hours which is great.