UV light does amazing things. All of my air purifiers have it.. I think its UV-C? My water purifier has it, my vacuum cleaner has it (Verilux) and I got this UV wand (Verilux too) to clean to hard to clean stuff like computer keyboards.
I can't speak from personal experience because I have no clue what it's killing in my home, but there were studies done on the wands and they did just what they claimed. Why hospitals aren't jumping on board is crazy.
Also, did you ever notice how some people get addicted to tanning booths? I think its because of how GOOD they make you feel... not so much the tan.