Another issues that may seriously influence your results is the "lysogenic"
state of the strains of E.coli you are using. Lysogens (phage) and colicins
are U.V. inducible hence sorting out true effects from the U.V. vs. induction
of lysogens may or maynot be a matter of concern to you..You can determine if
induction occurs by determining if a untreated control culture and the U.V.
treated culture shows a marked lysis of the treated one.
