On one hand this germicidal UVC fitting is quite well made, and on the other hand it has minimalist circuitry with a hidden trap.

The output power of this germicidal light is low, but still enough to cause skin irritation and temporary surface damage to your eyes.  (Arc-eye.  Feels like sand in your eyes.)
I'd guess it's designed for sterilisation of small enclosures.  The unit can take the ozone producing version of the GTL3 lamp too if you can source a real one.

Never use UVC germicidal light in areas that pets, humans or plants can be exposed to it.

This unit came from Banggood.  (Not a sponsor or affiliate link.)
https://www.banggood.com/UVC-UV-Lamp-Ultraviolet-Light-Bulb-3W-110-or-220V-Blacklight-p-1664546.html

If the manufacturer had added a 1/2W 470K resistor across the capacitor it would have reduced the risk of shock by helping to discharge the capacitor quickly.

A video just about the GTL3 lamp:-
https://www.youtube.com/watch?v=aBrLeOVBCaE

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