I ordered these stakes several months ago.  They were on back-order for quite awhile, and when I received them I discovered one was defective (it remained in the "on" position constantly).  I advised Wayfair and received another pair of stakes.  They worked fine at first, but within two weeks one of the units again remained lit constantly.  I'm going to use them for as long as they last because I think they are pretty and look good in my yard, but I wouldn't purchase another set and wouldn't recommend them since their performance is unreliable.