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Just a couple of the wide range of LED lamps openly sold on ebay that have deliberately exposed solder connections directly referenced to the mains supply. Both lamps in this video have the potential to cause a serious electric shock.
Since I'm getting quite a lot of comments from people who are trying to imply these lamps are not dangerous at all (presumably sellers) here's a link to aintbig's video showing how much current can flow when the exposed solder connections are touched. http://www.youtube.com/watch?v=n3ci4nlKhEk