No single standard for glare is promulgated in this section due to the impracticality of establishing such standards. It is the intent of these performance standards to ensure that both direct and indirect glare, to the extent possible, are eliminated or activities producing such glare are carried on within a structure. Necessary glare producing devices such as roadway and walkway lighting shall be designed, constructed and maintained in such a manner as not to be a nuisance to surrounding uses.