I was totally impressed with the quality of the product and was very exited to see them lighting. Unfortunately two of the four did not work, despite being on direct sunlight for a few days. But I’m not giving up on them, ordering a new set. Those that did light up are beautiful. They truly deserve a five star. The faulty lights worked if I swap the solar panel from those that did work. So, are not the lights, it has to be an issue with the button or the connection of the panel. Will see how the new set being ordered function. I may just keep the faulty for spare light or return to store, yet to decide on that.