I have had these lights for several months now. Moisture somehow gets inside them and shorts the LED's out as others have noted. They will start displaying the wrong colors on some of the LED's and sometimes every one of them and the light will display the wrong colors. Some of them may even quit working. I contacted Zuckeo when a few of them first started going bad and they did promptly send replacements but now a couple of the replacements have also started getting moisture in them and displaying the wrong colors. I took a couple of them apart that had a small amount of moisture appearing on the lenses, dried them out, cleaned them and reassembled them and used silicone to seal the lenses as well as where the wire enters but yet they still began to collect moisture inside. I now believe the aluminum housing may have poor castings that are too porous allowing humidity (moisture vapor) to enter the housings and it then condenses at night when the temperature drops. I just don't see any other way for moisture intrusion after I sealed everything with silicone. One thing is for certain, these lights are definitely NOT IP66 waterproof. I don't believe they have been tested to be certified a waterproof ratings because they would have without a doubt failed to pass testing for any rating. At this point, I believe I am going to replace them with another brand.
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