Ok so what ive learned is:

UVc Bulbs are fine, not LED.

LED UVc do not produce ozone.

Fish tank cleaners are UVc lights, they dont say they produce ozone but mine happens to produce ozone. . .

This is what I bought, https://www.amazon.com/dp/B07CH6WS7C/ except the 11watt version because the bulb is larger.

If you bulb produces ozone, you will be able to smell it. it kinda smells like bleach. It smells like static electricity... if that makes sense...

you can search keywords like:

UVc sterilizer.

fish tank uv light sterilizer.

UVc Ozone.

If you have a local fish or pet store, try calling them first because amazon will take a while to ship