E27 UVC lamps, basically in this case a long CFL with proper UV quartz glass, but without the fluorescent coating, seem to be popular in china to be screwed int

E27 UVC lamps, basically in this case a long CFL with proper UV quartz glass, but without the fluorescent coating, seem to be popular in china to be screwed into the ceiling. See biglive about it: https://www.youtube.com/watch?v=1m0TQjBRcFo https://www.youtube.com/watch?v=1m0TQjBRcFo