This is my fourth purchase of this fabulous solar lamp of china. I live on a farm and need a safe way to travel from the barn to house after dark. It is so dark that I have tripped over my dog standing in front of me because I couldn't see him. I was skeptical that this relatively small, all-in-one light and the solar panel would be sufficient for my needs. I used 8 meters existing steel post. Even though there have been lots of snow and gray days, the solar street light stays charged. Once I knew it worked perfectly, I bought 550 pcs more for our clients, so our clients have a complete path of bright light to walk safely from building to building.