Well....we have had some problems with our lights. The tree was up and perfect (well, in our eyes). The next night I plugged the lights in and the top set would not light.
My hubby got the light tester out and checked each and every one. They all seemed fine. So.....we will have to gently take off that set and replace it. In the meantime, it's been pretty dark.
I took photos before the ornaments and they looked beautiful in my camera screen. They are not so beautiful but at least you get the idea.