I thought it would be fun to get a couple more UVC germicidal lamps to explore. One obviously fake and one real.
UVC light does not usually get to the surface of the planet, which is a good thing, as it is very destructive. It is generated using mercury discharge lamps and other techniques to give a very strong sterilising effect for water, air and surfaces. Many factory food processing machines have these tubes inside them to sterilise things like conveyors.
The little GU10 lamps may not be UVC, but they put out a nice amount of near-UV light for decorative purposes. They could be used for curing some light activated glues or to make fluorescent materials glow. You might find it interesting to look at the research done on the germicidal properties of UVA. It's a bit vague and usually has disclaimers, like some sort of student science project that didn't yield the desired result.
The UVC tube is definitely a germicidal one with a whiff of ozone too. So absolutely do not expose eyes or skin to it. Naomi Wu made an interesting video on the use of these lamps with baffles, so they couldn't be viewed directly, but still shone the light above head height in rooms.
It's a really useful thing to be able to recognise these tubes in case you come across them at work. That could be in HVAC, water sterilisation or food environments. There are cases when people have installed these tubes in insect traps and caused health problems to people working in their vicinity.
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