Light can destroy or lower milk quality. Milk quality is altered through oxidative degradation of milk proteins and lipids which end in the development of off-flavors. Thus, cardboard cartons and colored glass bottles and containers are better. Some stores have specialized lighting in front of the milk area to remove/block fluorescent lighting. You will need to contact a university with dairy manufacturing specialists for more information (for example, the University of Wisconsin at http://foodsci.wisc.edu/ or South Dakota State University at http://www3.sdstate.edu/Academics/CollegeOfAgricultureAndBiologicalSciences/DairyScience/).
Mike Hutjens, Extension Dairy Specialist, University of Illinois - Illini DairyNET
