I bought 10 strings of the GE LED multicolor Christmas lights last year. During use, I noticed that some of the decorative covers popped off. At first I just thought they were loose during shipping, so I snapped them back on, only to find more lying on the ground a few days later. Upon further investigation, what I surmise is that during a rain, they fill up with water. Then, when you turn them on, the water heats up to the point where the pressure pops the covers off. When I took them down last year, they were all still working. I popped off all the covers that had visible water in them, emptied the water, then put the lights in storage. Today, I got ready to hang the lights, but not one of the 10 strands works. In looking at them, apparently the water from last year started a corrosion process that pretty much ruined the bulbs and the sockets that hold them. I called GE, but they wouldn't help me because I don't have the original box with the UPC on it, even though I gave them the model number that is written on the strand itself. I would not recommend using GE Christmas lights that are rated for outdoors, outdoors. They appear to have a defect that prevents you from using them as intended. I can't imagine that the issue doesn't create a shock or fire hazard. Makes me wonder how UL certified them for outdoor use. I will not be replacing my Christmas lights with GE brand.