HuskerNation

Just another thought on this, considering my master's thesis is on UV mutagensis in marine bacteria... You will want to use germicidal (UV-C) which is in the range of 190-290nm. This is the type of damage which causes direct damage (pyrimidine dimers, 6-4 photoproducts, rare base adducts, etc.). If you use UV-A (320-400nm), you will only get indirect damage via reactive oxygen species, and not even necessarily in the DNA, but also could effect enzymes and other proteins.