g23 socket and 11W UV-C bulb
You can use any fixture designed for the same type of 11W bulb, with a built-in ballast. 

The UVC bulb is quite different in that it has a quartz envelope rather than glass and lacks the phosphor coating of lamps designed for lighting, but electrically it is identical to an 11W white bulb. 

A few years ago, you would have been able to walk into (say) Ikea and get such a thing incredibly cheaply, however new CFL fixtures have been phased out in favor of LED bulbs so you may have to exercise some ingenuity. 

Edit: I see plenty of them on eBay, for example, some look dubious others, less so.