I bought three of these lights, and have them linked together as they are advertised to be capable of doing. The third light in the link will not completely shut off using the power switch - it continues to glow faintly, so it has to be turned off by unplugging it. With all of them running, they have tripped the GFCI twice in 4 hours now. When I tried to unplug the third light in the link from the second light in the link to see if whatever was causing the continuous glowing was also causing the GFCI issue, it fried (i.e. sparks and smoke) the outlet on the second light and tripped the GFCI again. It also pulled the outlet out of the unit. Now I have a light with a fried outlet, a light that won't completely turn off, and who knows what might be wrong with the other one. Not happy!