I have been using these lights for many years and am getting more and more frustrated. The first sets lasted a couple of years, last year I ordered 8 sets and three were half or gone when I took them off the tree. I tried replacing blown bulbs as well as fuses but nothing worked. This year I ordered three more sets and two more racks are now burned. I don't know if the quality has changed but it sure seems to be. This is very disappointing because they have that perfect glow which you can't find in stores so I may have to go back to flicker free next year because I can't spend that kind of money on lights every year.