Section 39.03.60.320 - LIGHTING, SIGNS MAY BE ILLUMINATED, SUBJECT TO THE FOLLOWING01.Flashing or Moving Lights. Signs which contain, include, or are illuminated by any flashing, intermittent, or moving light or lights are prohibited.02.Lights Which Impair Driver Vision. Signs which are not effectively shielded so as to prevent beams or rays of light from being directed toward any portion of the traveled way of a highway or which are of such intensity or brilliance as to cause glare or to impair the vision of the driver of any motor vehicle, or which otherwise interfere with any driver's operation of a motor vehicle are prohibited.03.Interference With Traffic Sign, Device, or Signal. A sign may not be so illuminated as to interfere with the effectiveness of, or obscure an official traffic sign, device, or signal.Idaho Admin. Code r. 39.03.60.320