An ultraviolet (UV) light sanitizing system includes an electromagnetic interference (EMI) reducing cover configured to couple to a housing of a UV lamp assembly having a UV light source that is configured to emit UV light through a light outlet of the housing. The EMI reducing cover is further configured to be disposed one or more of within, below, or over the light outlet. The EMI reducing cover includes one or more grids including beams and light openings defined between the beams. The light openings provide open areas through which the UV light emitted from the UV light source passes, and wherein the EMI reducing cover includes at least 90% open space. In at least one embodiment, the beams include at least one surface that is transverse to a direction of the UV light that is to be emitted from the UV light source. In at least one embodiment, wherein the EMI reducing cover includes an interior grid and an exterior grid.