In all zoning districts, for safety reasons, any private outdoor lighting fixture, whether temporary or permanent, other than gaseous tube letters in signs, shall be so placed or hooded that the light source itself shall not be directly visible at any point beyond the lot lines of the premises illuminated. A sign (including temporary interior window displays or banners) or its illuminator shall not by reason of its location, shape, size or color interfere with traffic or be confused with or obstruct the view or effectiveness of any official traffic sign, traffic signal or traffic marking. Therefore, flashing or animated signs of red, yellow or green colored lights are not permitted.