You live in Florida. There is mold everywhere. It is part of our everyday environment in the air and the soil. The presence of mold does not mean it needs to be eliminated or treated. Doing a home test for mold may well be positive but does not mean you should be buying a UV light to attempt to reduce the exposure.
There are unusual situations where mold needs to be treated, and UV is not the means of treatment.
Mold | Florida Department of Health