No they don’t last a lifetime ,what does? Yes they cannot be exposed to sunlight 24/7 ,but mine has been out in harsh weather since 2011 I have had to replace the slats ,but easy to do. I am no longer under warranty,but still a bargain replacing them.The rep that helped me Sarah, is personable and friendly,besides helpful and speaks great English ,go figure,not like some suppliers.Very sweet lady,nice for a change!