Absolutely. In my much more silly days as a young adult, I had a small marijuana grow operation for my own consumption. I somehow got ahold of an ultraviolet bulb and plugged it up in the closet. I knew it wasn't healthy for people but I had no idea about plants, so I limited my exposure to it.
Within about a day of using the bulb, the pot plants were all dead or dying.
I went on to research why, and discovered that UV damages all living things.
Ultraviolet light can kill microbes or bacteria.
it causes skin cancer, which may kill you.
Ultraviolet radiation can kill some microorganisms and has a role in the vitamin A synthesis.
Sometimes
Ultraviolet rays kill harmful germs present in the water, hence purifying it.
bacteria and germs
Ultraviolet light produced by Ultraviolet lamps is used to kill bacteria on food and surgical tools.
Yes, plants can kill plants in one day.
There is certain types of grass that kill plants, but normal yard grass will not, it also depends on the plants. But usually its the weeds that kill the plants, not the grass.
It takes 5 minutes.
Ultraviolet light.
No, it does not kill plants, it might be of some benefit to them.