received the lights fine,all lite up at first then the blue bulbs burned out. I have to use battery operated lights because I don't have enough outlets for regular plug ins. It's not a simple task to undecorated and re-decorate with new strings of lights. Customer service note: Sorry we didn't touch base on this set. As the batteries on these sets get weaker the lights don't do out all at once but the blue, then the green lights get dim since they use more power and then the rest of the lights go out. Replacing the batteries should correct the issue with the blue bulbs.