Not so long ago, someone here stated that this group exists to teach gullible individuals how to do things the hard way (as opposed to the correct way, or the effective way. Emphatically not the 'easy way').

This thread is a very nearly perfect example of that process.

a) Whereas light on the correct UV spectrum *will* kill many (not all) microbes and such, it is not designed against the stated purpose. As an Ozonator in a water sterilization device, fine. Or in a fume-hood.

NOTE FROM SECONDARY SOURCE: Germicidal lamps emit radiation in the UV-C portion of the ultraviolet (UV) spectrum, which includes wavelengths between 100 and 280 nanometers (nm). The lamps are used in a variety of applications where disinfection is the primary concern, including air and water purification, food and beverage protection, and sterilization of sensitive tools such as medical instruments. Germicidal light destroys the ability of bacteria, viruses, and other pathogens to multiply by deactivating their reproductive capabilities. The average bacteria may be killed in 10 seconds at a distance of 6 inches from the lamp.

b) That form of UVR that is effective in killing pathogens will also damage humans.

NOTE FROM SECONDARY SOURCE: UVR is not felt immediately; in fact, the user may not realize the danger until after the exposure has caused damage. Symptoms typically occur 4 to 24 hours after exposure. The effects on skin are of two types: acute and chronic. Acute effects appear within a few hours of exposure, while chronic effects are long-lasting and cumulative and may not appear for years. An acute effect of UVR is redness of the skin called erythema (similar to sunburn). Chronic effects include accelerated skin aging and skin cancer. UVR is absorbed in the outer layers of the eye €“ the cornea and conjunctiva. Acute overexposure leads to a painful temporary inflammation, mainly of the cornea, known as photokeratitis. Subsequent overexposure to the UV is unlikely because of the pain involved. Chronic exposure leads to an increased risk of certain types of ocular cataracts.
Working unprotected for even a few minutes can cause injury. It is possible to calculate the threshold for acute effects and to set exposure limits. It is not possible, however, to calculate threshold for chronic effects; therefore, because no exposure level is safe, exposure should be
reduced as much as possible.

c) If one takes the 30 seconds or so to research how UV light is used in laboratory settings to sterilize equipment, surfaces and instruments, one will see that, again, it is not indicated for the purpose stated hear.

Bottom line: UV light is not indicated. UV light is dangerous. UV light is not 'quick' either. To do what is required per the OP is good old 'asses and elbows' work, not the waving of a magic wand or, pun intended, light saber.