Wired flood light video discolored

 These camera's are beside one another facing the same direction. One has turned pink shaded this year the other is fine still. Both installed the same day. I can only assume the pink one must be catching direct sunlight. (I dont know). If this is the case, is there any recommendation to reduce the sun impact? Maybe adding tint over then lense? Is it uv impact? Or is it just an abnormal defect?