I ordered two of these candle sets for my upstairs windows for Christmas.  One set worked fine, and the other has two defective LED bulbs so they do not light at all!  Processing return now on the defective set.  Otherwise, if they work correctly, the convenience of the timer function would be marvelous!!  Automatic 6 hours on, and 18 hours off!  Always be wary of products from China - usually something is wrong!