I will be honest and say I have a mixed experience with lights4fun. We bought some strings of fairy lights for our village Christmas Tree three years ago. They were great. When we used them again the following year two of the strings were dim. At first L4F were reluctant to do anything because they were out of guarentee but when I sent the strings back they replaced them. Now this year some of the lights, not all, in two of the strings were out. We put up with this but after Christmas I sent them back. Of course they were miles out of quarentee. But now I've had to buy more. L4F gave me a discount. Hey they are left on the tree and used for what, about 10 days max. They simply shouldn't fail with this low usage. A friend has many L4F lights on the trees in his garden, bought at the same time as mine. They are all perfect