Purchased these lights to put up on our deck rails.   Put up five strings.   Looked beautiful.   Within a hour hour one string went out.  Replaced the fuse rehung and within a half hour lights went out again.  We thought that set was defective so we moved the lights leaving that string off and the plugged the remaining strings in.   Within a half hour poof another string went out.   We gave up!  These lights are a waste of money.