I have by now bought 3 of these lamp bases which I used to hold individually styled 3D printed lampshades. They work great!There are reports here that voice concern about the switch not being rated high enough and getting hot. I cannot confirm that, but I am using these lamps with a 100W (equivalent) LED bulb, which only draws ~12W, so very little current. With that load, I cannot discern any temperature difference of the switch to ambient.My sole question is whether there are any components in the lamp base that would preclude me from using it at 220V, i.e. in Europe. I would like to use the base for a personalized gift to family. I have no concern about the wire, but if the switch blows when the lamp is plugged into a 220V outlet, that would be a showstopper, of course.Bottomline: Unreserved recommend for the use I have described.