> Philips TUV 30W G30 T8 light bulbs, which, according to Philip’s website, emit 12 watts of UV-C radiation, mainly used for disinfecting surfaces.

12 watts optical power is a lot. A lot more powerful than lights you need eye protection for. Even if you don't have symptoms, you shouldn't look at such a light source too often.

It probably also emits UV-A and UV-B light, even when light sources often peak at very specific wavelengths. Still, you would probably also get brown skin from that and even a few hours would be noticable.