A system for irradiation of grain foods using one or more ultraviolet emitting sources is provided. The system includes an irradiation region in which the grain foods are irradiated by ultraviolet light. The system can include means for moving the grain foods through irradiation region, means for detecting the flow rate of the grain foods moving through irradiation region, and a control system for adjusting power provided to the ultraviolet emitting sources based on the flow rate of the grain foods.
