No lights, vibrations, noise, glare, radiation's, dust, odors
or smoke shall be propagated, generated or permitted to occur on any
lot in Business B districts except so that no effect of any of them
shall be visible, audible or perceptible beyond the boundaries of
the subject lot. Nevertheless, Business B premises and parking lots
may be wholly or partly floodlighted provided no lighting filament,
lamp, bulb or tube is directly visible from any point outside the
lot boundary of premises so illuminated.