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ARDEN HILLS PLANNING COMMISSION – June 4, 2014 8 • In the Gateway Business District, the source of illumination must be concealed so as not to be visible from adjoining lots and streets, or residential areas east and south of Round Lake. Accent lighting of buildings and sites may be permitted by the City. A lighting plan including the location, type, and design of light fixtures is required when development that involves new construction, redevelopment, or significant modification to an existing building is proposed. • In the Civic Center District, exterior lighting is required to be consistent in type, design, and scale to create unity in the district. The source of illumination must be concealed so as not to be visible from adjoining lots and streets, or residential areas south of Highway 96. Light washing of buildings is prohibited and wall packs are only allowed at building entrances. Accent lighting of buildings and sites may be permitted by the City. A photometric plan and a lighting plan including the location, type, and design of light fixtures is required when development that involves new construction, redevelopment, or significant modification to an existing building is proposed. Associate Planner Bachler reported that t he Additional Design Standards for the B-2 and B-3 Districts (Section 1325.05 Subdivision 8) also include lighting standards that only apply to building or site elements being developed or altered. For example, the lighting standards could come into effect if the remodeling of a parking lot was proposed. A lighting plan including the location, type, and design of light fixtures is required in all cases, and a photometric analysis is needed for new construction or redevelopment. Consistency in lighting in terms of type, design, scale, and color is required to create unity in the district, and the City may require certain types of lighting color. Excessive lighting is not permitted for any building or parking lot lighting. For gasoline stations, canopy lighting must be recessed so as not to be visible from the street. Light washing and accent lighting may only be allowed if it does not negatively impact residential areas or traffic safety. Staff has begun to research how other cities regulate lighting in their communities and has come across four general approaches to addressing the impact of exterior lighting on adjoining properties. These approaches are not mutually exclusive and can be used in combination with one another: 1. Limit the total overall amount of light that can be used on a site • This is typically addressed by setting an allowance for the total initial luminaire lumens allowed using a Parking Space Method (# of lumens per parking stall) or a Hardscape Area Method (# of lumens per square foot). • In order to determine compliance, a lighting plan would be required that includes the lumen output for each light fixture on the site. 2. Limit the maximum lumen level for individual exterior light fixtures • This can be addressed by setting a maximum allowable lumen rating for backlighting, uplighting, and glare for each light fixture. Communities that have taken this approach have set their standards based on recommendations made by the Illuminating Engineering Society of North America (IESNA).