Placed atop our newly installed white vinyl fence over the summer. It instantly added a "magical" charm to the yard! Every evening I was delighted to look out and see the 36 lights all lit. It is now the dead of winter and I am happy to say they ALL still light up when the sun goes down. I live in snow country up north so the short days and snow cover do effect the length of time the lights stay lit. Over the summer when days are longer and sunshine is brighter, the lights were still lit at 4am. Now that it is winter and the batteries don't get to charge as much the lights don't stay lit as long, but they ALL do light when the sun goes down. On sunnier days they do light for a longer period of time. I HIGHLY RECOMMEND this purchase and I would purchase again!!!