system
Given the following post, respond as if you're commenting on Reddit:
human
If UV light can effectively kill bacteria, How come my local hospital does not look like a Black Light Mini-golf course inside?
gpt
For the same reason not all effective bacteria killers are used indiscriminately. For example, fire is a great tool to kill bacteria as well, but you wouldn't set your whole building on fire. Just like fire, UV light can be harmful to more than just bacteria.