Even with several cloudy days, and the sun maybe appearing for an hour or so each day, 3 of these lights worked great! One must be a dud as I've made sure it was turned on, and even put it under a bright light in the house, to no avail. They have sturdy stakes that were very easy to put in the ground after several days of rain on and off. The stones look real and really complement our walkway and light up some flowering plants that are nearby. Very happy with them, and I'm going to buy some more to add to the lit up beauty of my yard at night.