[scientizscht (OP)]

What radiation kills bacteria and at what amount?

Apart from ionizing radiation which kills everything and apart from microwave radiation in an intensity that melts everything.

[evan_au]

There is no single answer - different types of bacteria have different thresholds for a lethal dose of radiation.

Complex multicellular organisms like ourselves have some cells that are more susceptible to radiation than other types (blood-producing cells in bone marrow, immune cells and stomach lining are more susceptible to radiation). We are only as strong as our weakest link.
- On the other hand, even if 1 in a million bacteria survive, it can rapidly regrow to a large colony all by itself.

Some bacteria have remarkable DNA repair mechanisms; some have even been discovered growing in the cooling water of a nuclear reactor.
See: https://en.wikipedia.org/wiki/Deinococcus_radiodurans#Ionizing-radiation_resistance
https://en.wikipedia.org/wiki/Radiotrophic_fungus#Discovery

[scientizscht (OP)]

can light kill bacteria and how much of it?

[chiralSPO]

can light kill bacteria

yes

how much of it?

four or five

[alancalverd]

Ultraviolet is a standard bactericide. Any supplier of commercial UVC equipment will be pleased to give you performance data and supply the relevant personal protective equipment, UV dosemeters, etc.

[scientizscht (OP)]

can light kill bacteria

yes

how much of it?

four or five

That's not scientific and rude.
Are you sure normal light kills bacteria? Obviously not at doses that burn skin?

[Bored chemist]

That's not scientific and rude.

There is a saying in English; "If you ask a silly question, you will get a silly answer."

[Kryptid]

can light kill bacteria and how much of it?

I'm not sure of the dosage, but blue light can kill acne bacteria: https://www.webmd.com/skin-problems-and-treatments/acne/phototherapy-for-acne#1

basically what demon said...

or name a fake person in some hard to get to location...

or just say **** it and let the children die, the world doesnt need more children.

Please try to keep your responses on topic. Thank you.